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Porsche > 911 & 912 (1965-1989) > Engine Rebuild Parts > Air Intake & Injection >

Inlet Manifold

Inlet Manifold

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DISPLAYING 1 to 16 (of 42 products)
1 2 3
Carburetor to manifold spacer, SET OF 4. Porsche 912 / 356 - 61610839300, 61610839000 - BP PS9326-IF
4
Carburetor to manifold spacer, SET OF 4. Porsche 912 / 356
61610839000/1KIT
Product Information
Product Information
Carburetor to manifold spacer, fits Solex 40PII-4.
The spacer is designed to sit between the carburettor base (typically a SOLEX 40 PII-4) and the intake manifold on classic Porsche models - 356 B/356 C and 912, manufactured to match Porsche OE specification.
SET OF 4

Fits:
Porsche 912 1965 - 1969
Porsche 356 B/C 1600/S90/SC 1960 - 1965

Diagram ref no 2 (for 912) or 4 (for 356)

This spacer provides the correct separation and sealing interface, ensuring proper carburettor alignment, uniform port matching and preventing heat soak from the manifold into the carburettor. It is manufactured from a high-temperature-resistant to replicate the original design and maintain correct insulating properties.

Ideal for engine rebuilds, intake servicing or performance restoration, this spacer restores the intended clearance, port geometry, and sealing integrity required for reliable induction performance in classic Porsche engines.

Over time, the original spacer can deteriorate, warp or crack because of exposure to heat cycling, vibration and fuel vapour. A compromised spacer may lead to vacuum leaks, mis-metered fuel/air mixture, uneven idle or reduced performance.

Replace this spacer when:
•  Performing a carburettor or intake manifold service or rebuild
•  The original spacer is cracked, delaminated or missing
•  Vacuum leaks or rough idle suggest induction sealing problems
•   Restoring a classic Porsche engine to factory specification

Fitting new spacer ensures the correct spacing, proper sealing and authentic air-flow behaviour you need for lasting engine performance and reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61610839000
61610839300
61610839000

The product you are viewing cross references to these numbers
Complete intake manifold pipe, SET OF 2. Porsche 911 2.4 S / 2.7 RS - 91111006302
5
Complete intake manifold pipe, SET OF 2. Porsche 911 2.4 S / 2.7 RS
91111006302/1KIT
Product Information
Product Information
Complete intake manifold pipe, SET OF 2. 
Restore or upgrade the air intake plumbing on your classic Porsche 911 with this complete intake connection assembly. Designed for models with MFI/mechanical fuel injection, this intake pipe links the throttle/air-intake stack to the intake manifold, ensuring accurate airflow, reliable metering and correct fitment.

Fits:
Porsche 911 2.4 S / 2.7 RS 1972 - 1977

Diagram Ref No 12

What This Product Does:

  • The intake pipe (or intake connection) is a critical component in the engine’s air delivery system: it connects the throttle body, intake stack or air intake system to the intake manifold of the engine.
  • It ensures a smooth, sealed, correctly shaped passage of air (and in the case of injection, the air-fuel mixture) into the cylinder head, maintaining correct airflow, avoiding leaks or turbulence that could upset fuel/air metering or engine response.
  • On the era of 911 referenced (MFI mechanical fuel injection), proper intake piping is important for correct function of the injection system, throttle response, and overall engine performance.

Symptoms Of Wear, Damage Or When Replacement Matters:
  • Air leaks or a hissing sound around the intake pipe, which can upset the injection/air-metering system, cause poor running, unstable idle or reduced performance.
  • Poor throttle response, hesitation or mis-firing — if the pipe is cracked, partially blocked, or has missing components, it can degrade engine performance.
  • Cracks, corrosion, or broken mounting tabs visible on the pipe or its flanges — especially for older vehicles where plastic/metal parts have aged.
  • Difficulty fitting or aligning connections between the throttle stack and manifold — if the pipe is out of shape or damaged, it may be difficult to achieve correct installation or clean sealing.

Why Replacement Matters:
  • Ensures correct airflow and engine performance: A damaged or sub-standard intake pipe can compromise air delivery, disrupt mixture control, and reduce engine efficiency or driveability.
  • Improves reliability: Old or worn intake components can lead to leaks, performance issues or even engine damage (if mixture is upset or induction temperatures become erratic). Replacing with a correct part restores the system.
  • Simplifies installation: Buying a “complete” intake connection (rather than patching multiple smaller pieces) saves installation time, reduces risk of missing parts, and ensures compatibility.
  • Ensures fitment integrity: In older vehicles, mounting points may have degraded—installing a new pipe with correct flanges/hardware ensures everything aligns properly, reducing stress or potential leaks.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91111006302
91111006302

The product you are viewing cross references to these numbers
Inlet manifold gasket, SET OF 12. Porsche 911 Carrera 3.2L 1984-89 - 93011019714, 71-25738-10, 712573810, 704.970
2
Inlet manifold gasket, SET OF 12. Porsche 911 Carrera 3.2L 1984-89
93011019714/1KIT
Product Information
Product Information
Inlet manifold gasket, SET OF 12.
OE Match replacement gasket built to meet original Porsche specifications, designed for the Porsche 911 Carrera 3.2L (1984–1989). This gasket provides a perfect seal between the intake manifold and the cylinder head, ensuring that air and fuel are delivered precisely to each combustion chamber.

Fits:
Porsche 911 Carrera 3.2L 1984 - 1989 
Engine code: 93020, 93025, 93026
Please note: NOT for 930 Turbo

Diagram Ref No 6.

•  Position: Between intake manifold and cylinder head
•  Function: Seals intake air passages, prevents vacuum or boost leaks
•  Replacement Interval: During intake removal, rebuild, or if leaks or idle issues occur
•  Benefits: Restores airtight sealing, smooth idle, and optimal air-fuel efficiency

Keep your classic Porsche running flawlessly with the OE Match 93011019714 Inlet Manifold Gasket. Built to OEM standards for the 911 Carrera 3.2, it seals the intake manifold to the cylinder head for airtight, efficient performance. Replace worn or leaking gaskets to restore smooth idle, strong power, and factory reliability.

Over time, intake gaskets harden and lose elasticity due to constant exposure to heat, pressure, and fuel vapours.

This can lead to:
•  Air or vacuum leaks affecting mixture balance and idle quality.
•  Reduced power, poor throttle response, or “hunting” idle.
•  Possible lean running and increased engine wear.

Replace during:
•  Intake manifold removal or service.
•  Engine rebuilds or top-end overhauls.
•  Any time vacuum leaks or air-fuel irregularities are detected.

Replacing with an OE Match gasket restores proper sealing, consistent idle, and smooth power delivery — crucial for maintaining your Porsche’s precision performance.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93011019714
93011019714
71-25738-10
712573810
704.970

The product you are viewing cross references to these numbers
Inlet manifold gasket, SET OF 6. Porsche 911 1974-83 - 93011019712, 71-24706-20, 93011019716, 93011019701, 91111019201 - 516-001, 71-24706-20
3
Inlet manifold gasket, SET OF 6. Porsche 911 1974-83
93011019716/1KIT
Product Information
Product Information
Inlet / Intake Manifold Gasket, SET OF 6.
Flat intake manifold gasket it used between the intake manifold runners and the cylinder head on Porsche flat-six engines. Each gasket seals one intake port pair; a complete engine typically uses six of them.

Fits:
Porsche 911 1974 - 1983  - 6pcs required


Diagram ref no 7.

This set of six intake manifold gaskets provides a complete gas-tight seal between the intake manifold and cylinder heads, ensuring that all air entering the engine follows the correct metered path through the CIS or fuel-injection system. By eliminating air leaks at the manifold flanges, these gaskets help maintain proper air–fuel mixture, support smooth idle and drivability, and prevent lean conditions that can raise combustion temperatures.

Over time, manifold gaskets naturally harden, shrink or crack from heat cycles, fuel vapour exposure and age. When this happens, the engine may draw in unmetered air, resulting in rough idle, poor cold running, lean mixture symptoms, hesitation or flat spots during acceleration. Vacuum leaks also make tuning more difficult and can lead to increased fuel consumption. Replacing old gaskets with a fresh set of six restores full sealing integrity, stabilises idle and mixture control, and helps the engine operate as intended.

When to replace
You should replace the full set of inlet manifold gaskets if:
• You are rebuilding or refreshing the top end of the engine.
• There are suspected vacuum leaks around the intake manifold.
• The engine shows rough idle, hunting, or lean-related symptoms not traced to other components.
• The existing gaskets are cracked, brittle, or oil/fuel soaked.
• You are upgrading, servicing or adjusting the CIS / intake system on a classic 911 or 930.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

93011019716
93011019712
71-24706-20
93011019716
93011019701
91111019201

The product you are viewing cross references to these numbers
Intake manifold flanges set of 6. Porsche 930 Turbo / 964 Turbo - 93011014103
4
Intake manifold flanges set of 6. Porsche 930 Turbo / 964 Turbo
93011014103/1KIT
Product Information
Product Information
Intake manifold flanges SET OF 6. Porsche 930 Turbo / 964 Turbo

oematch

Fits:
Porsche 911 (930) Turbo 3.0L / 3.3L 1975-89
Porsche 964 Turbo 3.3L / 3.6L 1991-94

Click 'Zoom in' for large parts diagram.
Diagram ref no 7

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Related, superseded, cross reference or alternative numbers for comparison.

93011014103
93011014103

The product you are viewing cross references to these numbers
Seal set for intake manifold, SET OF 12. Porsche 911 65-73 / 914-6 - 90110839104 - 911531
3
Seal set for intake manifold, SET OF 12. Porsche 911 65-73 / 914-6
90110839104/1KITX12
Product Information
Product Information
Seal set for intake manifold.
The set includes 12 intake manifold gasket pieces - enough to replace all applicable intake sealing locations when performing major engine or intake work on early Porsche. Intake manifold gaskets form the seal between the cylinder head and intake manifold. They prevent unmetered air leaks, maintain engine vacuum, and help ensure that the correct air-fuel mixture enters each cylinder.
SET OF 12

Fits:
Porsche 911 / L / TU / T
Porsche 911 T / 911 T-V 
Porsche 914-6 1970 - 1976

Diagram ref no 10

Function When installed correctly, these gaskets:
•  Seal the intake manifold to the cylinder head to prevent air and vacuum leaks
•  Maintain consistent airflow into the intake ports
•  Support stable idle and throttle response
•  Reduce risk of detonation, poor fuel economy, and rough running.

Over time, intake gaskets may become brittle or compressed from heat cycles and age. Replacing them - especially in sets during rebuild or service - helps restore proper sealing and engine efficiency.

Intake manifold gaskets are critical for proper engine breathing and vacuum integrity. Worn, hardened, or leaking gaskets can cause:
•  Vacuum leaks and unstable idle
•  Hesitation or stumbling under acceleration
•  Poor fuel economy
•  Increased exhaust emissions
•  Difficulty tuning carbureted or fuel-injected systems.

Replacing these gaskets in a complete set ensures all surfaces are sealed correctly, improves engine smoothness, and reduces the risk of running issues often misdiagnosed as other mechanical problems.

When to Replace. It’s recommended to replace intake manifold gaskets when:
•  Performing major engine service or a cylinder head rebuild
•  Intake manifold has been removed or loosened
•  You notice hissing sounds or rough idle
•  Vacuum gauge shows unstable readings
•  Rubber/composite gasket surfaces show cracks, compression set, or distortion
•  Engine has high mileage or long service life

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110839104
90110839104

The product you are viewing cross references to these numbers
Seal set for intake manifold, SET OF 6. Porsche 911 65-73 - 90110839104 - 911531
3
Seal set for intake manifold, SET OF 6. Porsche 911 65-73
90110839104/1KITX6
Product Information
Product Information
Seal set for intake manifold.
The set includes 6 intake manifold gasket pieces - enough to replace all applicable intake sealing locations when performing major engine or intake work on early Porsche. Intake manifold gaskets form the seal between the cylinder head and intake manifold. They prevent unmetered air leaks, maintain engine vacuum, and help ensure that the correct air-fuel mixture enters each cylinder.
SET OF 6

Fits:
Porsche 911 E 1969 - 1971
Porsche 911 T-E / E 1972 - 1973

Diagram ref no 8

Intake manifold gaskets create the seal between the intake manifold flanges and the cylinder head. They prevent unmetered air and vacuum leaks that can upset combustion, reduce engine efficiency, and cause rough running. Proper intake gaskets ensure that the correct air and fuel charge enters each cylinder for optimal performance.

Function. When installed correctly, these gaskets:
•  Seal the intake manifold to the cylinder head to prevent air and vacuum leaks
•  Maintain consistent airflow into the intake ports
•  Support stable idle and throttle response
•  Reduce risk of detonation, poor fuel economy, and rough running.

Over time, intake gaskets may become brittle or compressed from heat cycles and age. Replacing them - especially in sets during rebuild or service - helps restore proper sealing and engine efficiency.

Intake manifold gaskets are critical for proper engine breathing and vacuum integrity. Worn, hardened, or leaking gaskets can cause:
•  Vacuum leaks and unstable idle
•  Hesitation or stumbling under acceleration
•  Poor fuel economy
•  Increased exhaust emissions
•  Difficulty tuning carbureted or fuel-injected systems.

Replacing these gaskets in a complete set ensures all surfaces are sealed correctly, improves engine smoothness, and reduces the risk of running issues often misdiagnosed as other mechanical problems.

When to Replace. It’s recommended to replace intake manifold gaskets when:
•  Performing major engine service or a cylinder head rebuild
•  Intake manifold has been removed or loosened
•  You notice hissing sounds or rough idle
•  Vacuum gauge shows unstable readings
•  Rubber/composite gasket surfaces show cracks, compression set, or distortion
•  Engine has high mileage or long service life

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110839104
90110839104

The product you are viewing cross references to these numbers
Air intake manifold runner 911 to 964, billet aluminium with manifold gaskets. Porsche 911 - 93011045900
4
Air intake manifold runner 911 to 964, billet aluminium with manifold gaskets. Porsche 911
930110459
Product Information
Product Information
Air intake manifold runner 911 to 964, billet aluminium with manifold gaskets - Set of 6
Comes complete with thermal insulating manifold gaskets

islandworks

Fits:
Porsche 911 - 1974 to 1989

Used to fit 964 induction to 911 G-Model engines

Crafted from high-grade aircraft aluminum, our Porsche G-Model to 964 Billet Intake Runner delivers superior performance enhancements. Available in various cylinder head port diameters ranging from 34mm to 42.5mm, with options for standard injector sizes. 

Compatibility and Customization:
Tailored specifically to fit Porsche 2.7-3.2L engines, this intake runner enables seamless mounting of a Porsche 964/993 type intake. Unlike the 964/993's 3-bolt attachment, our design utilizes a 2-bolt M8 attachment for cylinder head placement.

Versatile Use and Configurations:
Compatible with standard rails or designed for use with the IslandWorks/Nuke system featuring a direct mount fuel regulator. 

Superior Craftsmanship and Finish:
Each runner boasts a natural machined finish, complemented by a base gasket insulator for optimal performance. To ensure that every set of intake runners arrives in style, they are shipped in a personalized color-of-the-day gift box as shown in the images.

Important Note:
This product requires a flat cylinder head seal (included in set) for superior heat insulation, deviating from the conventional seal type.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

930110459
93011045900

The product you are viewing cross references to these numbers
Air intake pipe to throttle body gasket. Porsche 911 65-73 - 90110839801, 911532, 90110839800
2
Air intake pipe to throttle body gasket. Porsche 911 65-73
Special Order item
90110839801
Product Information
Product Information
Air intake pipe to throttle body gasket.

porsche

Fits:
Porsche 911 1965-69 L / T / TU / S WEBER Carburettor cars
Porsche 911 1970-73 T / T-V ZENITH Carburettor cars
Porsche 914-6 1970-76

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

90110839801
90110839801
911532
90110839800

The product you are viewing cross references to these numbers
Air intake pipe to throttle body gasket. Porsche 911 65-73 - 90110839801, 911532, 484.107 - 50-92092-00
2
Air intake pipe to throttle body gasket. Porsche 911 65-73
Special Offer
90110839801/1
Product Information
Product Information
Air intake pipe to throttle body gasket.

Fits:
Porsche 911 1965-69 L / T / TU / S WEBER Carburettor cars
Porsche 911 1970-73 T / T-V ZENITH Carburettor cars
Porsche 914-6 1970-76

Diagram ref no 3

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90110839801
90110839801
911532
484.107

The product you are viewing cross references to these numbers
Air intake pipe to throttle body gasket. Porsche 911 69-77 - 91111019101, 911530/01
2
Air intake pipe to throttle body gasket. Porsche 911 69-77
Special Order item
91111019101
Product Information
Product Information
Air intake pipe to throttle body gasket.

porsche

Fits:
Porsche 911 1969>> E / S
Porsche 911 1970-73 T-E / E / S
Porsche 911 1974-77 911/83

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91111019101
91111019101
911530

The product you are viewing cross references to these numbers
Air intake pipe to throttle body gasket. Porsche 911 69-77 - 91111019101, 50-92089-00 - 911530/01
2
Air intake pipe to throttle body gasket. Porsche 911 69-77
Special Offer
91111019101/1
Product Information
Product Information
Air intake pipe to throttle body gasket.

oematch

Fits:
Porsche 911 1969>> E / S
Porsche 911 1970-73 T-E / E / S
Porsche 911 1974-77 911/83

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

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91111019101
91111019101
50-92089-00

The product you are viewing cross references to these numbers
Air intake velocity stack set. Porsche 911 S - 91111032203 - FUE11.2.105
2
Air intake velocity stack set. Porsche 911 S
91111032203/1
Product Information
Product Information
Air intake velocity stack set.
Set contains 6 stacks 

Fits:
Porsche 911S - 1970 to 1973

42mm velocity stack for Porsche 911 S engines, 2.2ltr and 2.4ltr - Not for Sportomatic

This high-quality aluminum velocity stack, with a diameter of 42mm, is specially designed for use in Porsche 911 S engines built between 1970 and 1973.
The funnel set ensures a precise fit and compatibility with the corresponding vehicle models.
Made from durable materials and manufactured to the highest quality standards, this funnel provides optimum performance for your Porsche 911 S.
The 42mm diameter allows for efficient airflow.

Diagram ref no 30



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Related, superseded, cross reference or alternative numbers for comparison.

91111032203
91111032203

The product you are viewing cross references to these numbers
Carburetor to manifold spacer. Porsche 912 / 356 - 61610839300, 61610839000 - 61610839000
5
Carburetor to manifold spacer. Porsche 912 / 356
Special Order item
61610839000
Product Information
Product Information
Carburetor to manifold spacer, fits Solex 40PII-4.

Fits:
Porsche 912 1965 - 1969
Porsche 356 B/C 1600/S90/SC 1960 - 1965

Diagram ref no 2 (for 912) or 4 (for 356)

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61610839000
61610839300
61610839000

The product you are viewing cross references to these numbers
Carburetor to manifold spacer. Porsche 912 / 356 - 61610839300, 61610839000 - BP PS9326-IF
3
Carburetor to manifold spacer. Porsche 912 / 356
61610839000/1
Product Information
Product Information
Carburetor to manifold spacer, fits Solex 40PII-4.
The spacer is designed to sit between the carburettor base (typically a SOLEX 40 PII-4) and the intake manifold on classic Porsche models - 356 B/356 C and 912, manufactured to match Porsche OE specification.
Sold each, 4 required per vehicle. 

Fits:
Porsche 912 1965 - 1969
Porsche 356 B/C 1600/S90/SC 1960 - 1965

Diagram ref no 2 (for 912) or 4 (for 356)

This spacer provides the correct separation and sealing interface, ensuring proper carburettor alignment, uniform port matching and preventing heat soak from the manifold into the carburettor. It is manufactured from a high-temperature-resistant to replicate the original design and maintain correct insulating properties.

Ideal for engine rebuilds, intake servicing or performance restoration, this spacer restores the intended clearance, port geometry, and sealing integrity required for reliable induction performance in classic Porsche engines.

Over time, the original spacer can deteriorate, warp or crack because of exposure to heat cycling, vibration and fuel vapour. A compromised spacer may lead to vacuum leaks, mis-metered fuel/air mixture, uneven idle or reduced performance.

Replace this spacer when:
•  Performing a carburettor or intake manifold service or rebuild
•  The original spacer is cracked, delaminated or missing
•  Vacuum leaks or rough idle suggest induction sealing problems
•   Restoring a classic Porsche engine to factory specification

Fitting new spacer ensures the correct spacing, proper sealing and authentic air-flow behaviour you need for lasting engine performance and reliability.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

61610839000
61610839300
61610839000

The product you are viewing cross references to these numbers
Complete Intake Connection Assembly. Porsche 911 1972-77 - 91111006302 - 2205-2
4
Complete Intake Connection Assembly. Porsche 911 1972-77
91111006302/1
Product Information
Product Information
Complete Intake Connection Assembly.
Restore or upgrade the air intake plumbing on your classic Porsche 911 with this complete intake connection assembly. Designed for models with MFI/mechanical fuel injection, this intake pipe links the throttle/air-intake stack to the intake manifold, ensuring accurate airflow, reliable metering and correct fitment.
Sold Each.
x2 Required Per Car.
Fits Left And Right.

Fits:
  • Porsche 911 1972-1973 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1977 2.7L

Diagram Ref No 12

What This Product Does:

  • The intake pipe (or intake connection) is a critical component in the engine’s air delivery system: it connects the throttle body, intake stack or air intake system to the intake manifold of the engine.
  • It ensures a smooth, sealed, correctly shaped passage of air (and in the case of injection, the air-fuel mixture) into the cylinder head, maintaining correct airflow, avoiding leaks or turbulence that could upset fuel/air metering or engine response.
  • On the era of 911 referenced (MFI mechanical fuel injection), proper intake piping is important for correct function of the injection system, throttle response, and overall engine performance.

Symptoms Of Wear, Damage Or When Replacement Matters:
  • Air leaks or a hissing sound around the intake pipe, which can upset the injection/air-metering system, cause poor running, unstable idle or reduced performance.
  • Poor throttle response, hesitation or mis-firing — if the pipe is cracked, partially blocked, or has missing components, it can degrade engine performance.
  • Cracks, corrosion, or broken mounting tabs visible on the pipe or its flanges — especially for older vehicles where plastic/metal parts have aged.
  • Difficulty fitting or aligning connections between the throttle stack and manifold — if the pipe is out of shape or damaged, it may be difficult to achieve correct installation or clean sealing.

Why Replacement Matters:
  • Ensures correct airflow and engine performance: A damaged or sub-standard intake pipe can compromise air delivery, disrupt mixture control, and reduce engine efficiency or driveability.
  • Improves reliability: Old or worn intake components can lead to leaks, performance issues or even engine damage (if mixture is upset or induction temperatures become erratic). Replacing with a correct part restores the system.
  • Simplifies installation: Buying a “complete” intake connection (rather than patching multiple smaller pieces) saves installation time, reduces risk of missing parts, and ensures compatibility.
  • Ensures fitment integrity: In older vehicles, mounting points may have degraded—installing a new pipe with correct flanges/hardware ensures everything aligns properly, reducing stress or potential leaks.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91111006302
91111006302

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 42 products)
1 2 3
Also found on these pages
About Inlet Manifold

Air Inlet Manifolds – Precision Airflow Distribution for Porsche Engines

Air inlet manifolds, often referred to as intake manifolds, are vital components in Porsche engines that ensure even air distribution to each cylinder. By controlling the air supply entering the combustion chambers, these manifolds optimise engine breathing, improving fuel efficiency, throttle response, and overall performance.

At Design911, we supply a wide range of genuine and high-quality air inlet manifolds for numerous Porsche models, including  911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each unit is crafted from high-strength materials to deliver consistent airflow, exceptional durability, and precise fitment — maintaining your Porsche’s power and refinement.

What Do Air Inlet Manifolds Do?

The air inlet manifold is a critical part of the intake system that manages and distributes air from the throttle body into the engine’s cylinders. Its functions include:

  • Delivering uniform airflow to each cylinder for efficient combustion.
  • Optimising torque and power output across all engine speeds.
  • Balancing air pressure for smoother idling and acceleration.
  • Enhancing engine cooling and fuel economy through consistent airflow management.

In performance-oriented Porsche engines, the air inlet manifold is carefully tuned to maximise airflow dynamics — contributing directly to the car’s responsiveness and driving feel.

Why Do Air Inlet Manifolds Fail?

Air inlet manifolds operate under constant pressure, heat, and vibration, which can lead to deterioration over time. Common causes of failure include:

  • Cracks or leaks in plastic or aluminium housings due to heat cycling.
  • Carbon buildup restricting airflow through the manifold runners.
  • Faulty gaskets or seals allowing unmetered air to enter the system.
  • Vacuum leaks affecting idle stability and performance.
  • Mechanical damage caused by backfires or overpressure.

Symptoms of a failing air inlet manifold may include rough idling, loss of power, engine misfires, increased fuel consumption, or a check engine light related to air intake irregularities.

Why Replace a Damaged Air Inlet Manifold?

A cracked or leaking air manifold can cause air imbalance, poor combustion, and reduced engine efficiency. Replacing the component restores smooth airflow, optimises fuel economy, and protects engine health.

Benefits of replacement include:

  • Restored airflow and balanced combustion.
  • Improved throttle response and power delivery.
  • Reduced emissions and improved fuel efficiency.
  • Long-term reliability with manufacturer-quality precision.

All air inlet manifolds available at Design911 are made with high-quality materials, precision-engineered sealing surfaces, and optimised airflow geometry — ensuring lasting durability and peak performance in both standard and high-performance Porsche engines.

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