adapter Genuine Porsche part 9P1129637

BMC Air Filter



This Product Fits:
Porsche 911 (991.2) 3.0L Carrera / Carrera 4 2016>>
Porsche 911 (991.2) 3.0L Carrera GTS / 4 GTS 2017>>
Porsche 911 (991.2) 3.0L Carrera S / 4S 2016>>
Porsche 911 (991.2) 3.0L Carrera T2017>>

Panel Filter Size:
- width - 126 / 167 mm
- length - 651 mm

Oil quantity for regeneration (gr): 138


BMC air filters are designed and produced to ensure a higher air flow than original paper filters. In F1, for example, BMC cotton filters minimize the loss of air flow pressure passing through the air filter; this way ensures the best conditions for full exploitation of maximum power. Therefore the benefits of replacing the original paper filter with BMC cotton air filter, produced using the same technology and materials as the F1 air filters, are evident.

DESIGN AND MATERIALS
Qualified engineers using advanced software and expert technicians using the latest technologies produce BMC air filters. An F1 filter must be very light, must be made of the best raw materials and must improve performance. For this reason we use only alloy mesh with epoxy coating to ensure protection from petrol fumes and from oxidization due to the humidity of the air. The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability.

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FB907

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Acceleration Time : 60-130mph Reduced By 0.2 seconds

Fitment: Porsche 991.1 991.2 Turbo, Turbo S

The 991 Turbo Eventuri intake system was developed through extensive real world testing with the aim of allowing the turbos to work more efficiently. By replacing the single stock airbox with individual patented Venturi filter housings, the turbos are able to spool and generate boost with less drag. As a result, the wastegate duty cycles are reduced resulting in peak boost at lower RPM and therefore performance is increased. The two individual filters provide a larger filtration area as compared to the single stock panel filter. Furthermore, in order to keep inlet air temperatures down, the Venturi housings are sealed against an air duct which draws ambient air from the same location as the stock system. Since the 911 Turbo engine bay is densely packed, high IATs can only be avoided by ensuring a fully sealed intake system. The combination of a smoother airflow path to each turbo with low IATs results in higher performance and a sharper throttle response over the stock airbox.

The Eventuri Difference

The 911 Turbo Eventuri system uses our Patented Carbon Fibre Housings with our Gen 2 bespoke filters, which provide an aerodynamically efficient airflow path from the filter to the turbos. Not just another cone filter with a heat shield but a unique design which invokes the Venturi affect and maintains laminar flow conditions to reduce the drag on the turbo.


Each intake system consists of:

2 x Carbon Fiber Venturi Housings with Integrated Tubes
2 x Bespoke High Flow Generation 2 Filters
2 x Aluminium Inlet Cowls
Carbon Fiber inlet duct
Laser Cut Stainless Steel bracket work


INTAKE HOUSING ASSEMBLY
The filter housings comprise of our bespoke generation 2 filters, aluminium inlet cowls, the carbon pods and integrated tubes. The carbon pods shroud the reverse mounted filters and smoothly shape the airflow down to the stock turbo inlet tubes. By separating the inlet path and having a dedicated filter for each turbo, the intake allows the turbos to function more efficiently. Crucially, the Venturi housings organically extend with a smooth curve from the filter opening to the stock turbo tubing. This ensures that the airflow remains as smooth as possible throughout the system. Smooth airflow results in less drag and therefore the turbos can reach peak boost sooner in the RPM range. It also means that the throttle response feels sharper.

PATENTED TECHNOLOGY

Our patented filter housings have a smooth reduction in cross sectional area as they shroud the filters and taper down to the tubing. This geometry invokes the Venturi effect where the airflow accelerates whilst maintaining laminar conditions. It can be thought of as a large velocity stack - below is a diagram to show the comparison between our patented design and a regular intake system. Our bespoke filters aid the airflow moving through the housings and allow for an even velocity profile as the airflow exits the housings.

INTAKE DUCT
The intake duct seals against the underside of the boot-lid using the stock rubber cushion and then extends down to seal against the filter housings. Crafted from 100% prepreg carbon fiber the intake duct ensures that the intake pulls in ambient air only and not heated engine bay air. Again in order to maximise flow efficiency the transition from the circular openings for the filter housings to the single air entry point is as smooth as possible. The duct also features 2 drain tubes which direct water away from the filters. The tubes are designed such that the intakes will draw a minimum amount of air from within the engine bay due to the larger flow resistance in the tubes as compared to the opening at the top of the duct. The complex geometry of the duct was necessary to clear the various components in the engine bay of the 991 Turbo.

BRACKET WORK
The brackets are laser cut from stainless steel and powder coated. We went to great lengths to ensure that the intakes have a precision fitment using the stock airbox mounting locations. The brackets not only brace the intakes to the chassis but also allow engine components to be secured as they are with the stock airbox. In order to save weight, each bracket has purposely shaped cutouts which remove material yet allow the overall structure to remain rigid.

The complete system comes together to provide an audible and noticeable performance improvement over the stock airbox system.

Please download the installation guide HERE

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EVE-P991T-INT

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Alpha performance high-flow dry media filter for Porsche 991.2 Carrera



Fits:
Porsche 991.2 Carrera

PLEASE NOTE: NOT LEGAL FOR USE ON POLLUTION CONTROLLED MOTOR VEHICLES. THIS PRODUCT IS FOR RACING COMPETITION ONLY AND IS NOT LEGAL FOR USE ON HIGHWAY OR STREET VEHICLES, OR OTHER NON-RACING COMPETITION OFF-ROAD VEHICLES.

Exclusive Benefits:

• Highest Quality and Best Performing Dry Media • Filters on the Market
• Smooth Interior Transition End Caps Reduce Turbulence
• Optimum Number of Pleats for Optimum Air Filtration
• Designed in SolidWorks for Perfect Fitment
• Simple Installation Without Having to Perform • Unsightly Modifications
• High Quality Materials to Last the Lifetime of your 991.2
• Provides a Factory Fit & Finish Unmatched in the • Automotive Aftermarket Industry
• Easy to Clean for Future Maintenance

Includes:

• Dry Media Filter Element
• Alpha Branded End Caps

Cleaning Instructions:

Our filter uses a specially designed media that restores performance and efficiency to near new each time by simply cleaning it with compressed air (30-40 psi) from the inside out. Frequent washing is unnecessary in order to restore filter performance. For a deep cleaning after exposure to extreme environments, a biodegradable cleaner such as Simple Green or other mild shop degreaser can be used. Place the filter in a solution or spray the cleaner on the filter. Allow the solution to loosen dirt particulates and rinse thoroughly. Shake the filter or use compressed air from the inside blowing outward to remove residual water. Allow a full day to dry.

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ALP.26.08.0001-1

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Air filter.
Genuine Porsche engine air filter manufactured to original factory specifications. It serves as the correct replacement air filter for select Porsche 911 (991.2 Carrera) models, ensuring proper fit, filtration efficiency, and performance exactly as designed by Porsche engineers.

Fits:
Porsche 991.2 Carrera 2 / 2S / GTS 2016 - 2019
Porsche 991.2 Carrera 4 / 4S / GTS 2016 - 2019
Porsche 991.2 Targa 4 / 4S / GTS 2016 - 2019

Diagram ref no 4

The primary function of the Porsche 9P1129620 air filter is to clean incoming air before it enters the engine’s intake tract. It removes dust, pollen, dirt, and other airborne contaminants that could damage piston rings, cylinders, valves, or other delicate internal components if left unchecked. By ensuring only clean air reaches the engine, it supports stable combustion, efficient throttle response, and long-term engine health.

Using a Genuine Porsche air filter helps preserve the engineered balance between filtration efficiency and airflow, ensuring the engine receives the right amount of clean air required for proper combustion and performance.

Over time, air filters accumulate contaminants that restrict airflow and reduce engine efficiency. A clogged or worn air filter can lead to:
•  Reduced engine responsiveness
•  Increased fuel consumption
•  Greater intake restriction under load
•  Higher risk of internal wear from unfiltered debris.

Replacing the air filter with a Genuine Porsche part restores clean airflow, supports efficient combustion, and helps maintain factory-level engine performance and longevity.

Replace the air filter if:
•  The filter appears visibly dirty, dusty, or discoloured
•  Reduced throttle response or engine sluggishness is noticed
•  Scheduled maintenance interval is due
•  Driving frequently in dusty, off-road, or high-pollution environments.

Routine inspection and timely replacement help protect engine components and support peak performance.

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9P1129620

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Air filter



Fits:
Porsche 991 II GT2 RS 3.8L 2018
(Engine Type: DHNA)

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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9P1129620A

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Replacement air filter. 
This air filter element is a standard replacement filter that fits into the Porsche 991.2 Carrera air intake system. It’s engineered to match the original part’s size, sealing surfaces, and filtration characteristics for precise fit and dependable performance, direct-fit install in the factory airbox without modification. The filter captures airborne dust, dirt, and debris before the air enters the engine, helping maintain clean airflow for optimal combustion and engine protection.

Fits:
Porsche 991.2 Carrera 2 / 2S / GTS 2016 - 2019
Porsche 991.2 Carrera 4 / 4S / GTS 2016 - 2019
Porsche 991.2 Targa 4 / 4S / GTS 2016 - 2019

Diagram ref no 4

The engine air filter’s primary role is to clean incoming air before it enters the engine’s combustion chambers. By trapping contaminants such as dust, pollen, and environmental debris, the air filter helps ensure the engine receives clean air needed for efficient combustion. This protects critical internal components like pistons, valves and cylinder walls from premature wear. Clean intake air also supports consistent power delivery, smooth throttle response and improved fuel economy.

Over time, air filters become loaded with trapped contaminants that restrict airflow and reduce combustion efficiency. A clogged or worn air filter can cause reduced throttle response, increased fuel consumption, and heightened engine wear due to unfiltered particles entering the intake. Replacing the air filter with a quality OE Match unit restores clean airflow, supports efficient engine function, and helps maintain performance and longevity.

Replace the air filter if you notice:
• Visible dirt, dust build-up, or discoloration on the filter media
• Reduced engine responsiveness or power delivery
•  Higher than normal fuel consumption
•  After a specified service interval or frequent dusty driving.

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9P1129620

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DesignTek Performance air filter.
Upgrade your intake system with a DesignTek Performance Air Filter, engineered to deliver increased airflow, improved throttle response, and long-lasting filtration. Designed as a direct replacement for your factory filter, DesignTek performance filters combine high-flow cotton gauze media with a durable, reusable construction - making them the ideal solution for drivers who want both performance and protection.

Fits:
Porsche 991.2 Carrera 2 / 2S / GTS 2016 - 2019
Porsche 991.2 Carrera 4 / 4S / GTS 2016 - 2019
Porsche 991.2 Targa 4 / 4S / GTS 2016 - 2019

Diagram ref no 4

DesignTek filters are washable and reusable, reducing the need for frequent replacements while maintaining excellent filtration efficiency. The pleated multi-layer filter media is built to capture harmful particles while allowing a greater volume of air to reach the engine - helping support more consistent power delivery and sharper acceleration.

Whether you’re driving daily, touring, or enjoying spirited performance runs, a DesignTek Performance Air Filter is a smart upgrade that provides high filtration, high flow, and long service life with minimal maintenance.

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9P1129620

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