Gaskets & Sets

Fits:
Porsche 911 1974-89
Porsche 930 Turbo 1975-89
Porsche 964 Turbo 3.3L 1991-92
Click 'Zoom in' for large parts diagram.
Diagram ref no 30
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970146840
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
Fits:
Porsche 911 1968-89
Diagram ref No 11 (LEFT) or 12 (RIGHT)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010519
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)


Fits:
Porsche 911 1968-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010519306
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)

Fits:
Porsche 911 1968-89
Click 'Zoom in' for large parts diagram.
Diagram Ref No 6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010519306
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)

Fits:
All Porsche 911 1965-77 (including Turbo)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090705
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1975-1977 3.0L Turbo (930)
for early Porsche air-cooled flat-six engines, including the 911 and 930 Turbo. This OE Match replacement is built to original Porsche specifications, matching the factory dimensions, thickness, and sealing quality for a perfect fit. Positioned between the crankcase and cylinder base, it provides a reliable seal to prevent oil and combustion leaks, ensuring lasting engine integrity and performance.
Fits:
Porsche 911 3.0ltr - 1976 to 1977
Porsche 911 3.0ltr / 3.2ltr - 1978 to 1989
Porsche 911 turbo 3.0ltr - 1975 to 1977
Diagram Ref No 5.
Position on Car: Between engine block (crankcase) and cylinder base in air-cooled engine.
Over time the cylinder‐base gasket can degrade due to thermal cycling, vibration and age, leading to oil seepage, reduction in compression sealing or potential engine case contamination. Replacing it with a high-quality replacement gasket ensures the joint is properly sealed, avoids loss of performance and prevents possible engine damage.
Replace when:
• You are performing an engine rebuild or cylinder removal.
• You detect oil seepage or visible signs of leakage from the cylinder base area.
• You observe compression loss, or gasket part numbers are referenced in service documentation for your engine variant.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93010419401
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1975-1977 3.0L Turbo (930)
- Porsche 911 1978-1989 3.3L Turbo (930)

Fits:
Porsche 911 2.7L 1974-77 with CIS Injection (not Turbo)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090110
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 CARRERA 2.7L 1973-76
K-JETRONIC
Cylinder Head: 911/83
BHP: 209 / 211
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090503
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 CARRERA 2.7L 1973-76
K-JETRONIC
Cylinder Head: 911/83
BHP: 209 / 211
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090503
The product you are viewing cross references to these numbers
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 2.7L 1974-77 (early exhaust)
K-JETRONIC
Cylinder Head: 911/92/93/97/98
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090501
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 2.7L 1974-77 (early exhaust)
K-JETRONIC
Cylinder Head: 911/92/93/97/98
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090501
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera


Fits:
Porsche 911 S 2.7L 1975-77 (late exhaust)
For Cylinder Head
911/41/42/43/46/47/48
911/81/82/84/85/86/89
911/90/94/99
K-Jetronic
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090703
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

Fits:
Porsche 911 S 2.7L 1975-77 (late exhaust)
For Cylinder Head
911/41/42/43/46/47/48
911/81/82/84/85/86/89
911/90/94/99
K-Jetronic
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110090703
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Typical Applications
Hylomar Gasket 3400 can be used as a gasketing compound between machined surfaces. It is ideal for sealing between mating faces on engines and transmission components where resistance to temperature and vibration are essential.
INSTRUCTIONS FOR USE
Hylomar Gasket 3400 should be applied to clean and dry surfaces, free of contamination such as oil or grease. The compound may be dispensed by hand from cartridge, concertina pack, or via a screen printing system. Once applied the joint should be assembled as soon as practical. Any excess compound can be easily wiped off external surfaces with a clean cloth soaked in Acetone or other suitable solvents.
Typical Physical Properties:
UNCURED PRODUCT
Composition: Methyl-Methacrylate
Colour: Yellow
Viscosity @ 25°C / Brookfield Spindle 6 @ 2.5rpm: 100,000cps
Specific Gravity @ 25°C: 1.10 g/ml
Solvent Content: None
Specific Gravity g/ml @ 25°C: 1.04
Flash Point: >100°C
Shelf Life: 1 Year @ 4° to 25°C
CURED PRODUCT
Handling Time: 40 minutes
Functional Cure Time: 4 – 6 hours
Full Cure Time : 24 – 72 hours
Shear Strength : 1.5 N/mm²
Mild Steel/Mild Steel BS 5350 Part C5
Aluminium/Aluminium BS 5350 Part C5
Temperature Range: -40° to 150°C

Fits:
Porsche 911 1974-83
Click 'Zoom in' for large part diagram.
Diagram Ref No 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011019712
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC


Fits:
Porsche 911 1974-83
Click 'Zoom in' for large part diagram.
Diagram Ref No 7.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011019716
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
Engine Gaskets & Gasket Sets – Precision Sealing for Porsche Engines
Engine gaskets are vital components that ensure your Porsche’s engine operates efficiently and leak-free. Positioned between key engine surfaces such as the cylinder head, intake manifold, and oil pan, gaskets maintain a perfect seal against high temperatures, pressures, and fluids.
At Design911, we offer a comprehensive range of engine gaskets, seals, and complete gasket kits for Porsche models of every generation. Each gasket is crafted from high-quality composite, metal, or elastomer materials to withstand the extreme conditions of high-performance engines — ensuring optimal sealing, reduced oil and coolant leaks, and consistent compression.
Whether you’re rebuilding a classic 911 flat-six or servicing a modern turbocharged Porsche engine, our manufacturer-quality gaskets and complete kits guarantee reliability, performance, and peace of mind.
What Do Engine Gaskets and Gasket Sets Do?
Gaskets play a critical role in ensuring that various engine systems — combustion, lubrication, and cooling — remain properly sealed.
Core Functions:
- Prevent
leaks of oil, coolant, air, and combustion gases.
- Maintain
compression between the engine block and cylinder head.
- Ensure
efficient combustion and proper engine pressure balance.
- Protect internal components from cross-contamination of fluids.
A properly sealed engine not only improves performance and efficiency but also prevents costly long-term damage.
Why Do Gaskets Fail?
Despite their durability, gaskets naturally degrade over time due to extreme heat cycles, pressure variations, and material fatigue.
Common Causes of Gasket Failure Include:
- Overheating,
causing warping or breakdown of the gasket material.
- Improper
installation or torqueing during assembly.
- Aging
materials that harden or crack with use.
- Chemical
degradation from oil or coolant exposure.
- Uneven pressure or engine vibration, leading to micro-leaks.
Typical symptoms of gasket failure include oil or coolant leaks, reduced compression, overheating, or visible residue at gasket joints.
Why Replace with Precision-Engineered Gaskets and Kits?
Replacing worn or leaking gaskets is essential to maintain proper engine compression, prevent contamination, and restore overall reliability. Our direct-fit gasket sets and kits are designed to meet or exceed Porsche engineering standards, providing complete sealing solutions for rebuilds and maintenance.
Key Benefits:
- Restores proper sealing and compression integrity.
- Prevents oil and coolant leaks for cleaner performance.
- Enhances efficiency and reliability under load.
- Manufactured from high-grade, heat- and pressure-resistant materials.
- Available
as individual gaskets or complete kits for full rebuilds.
- Direct-fit compatibility for a wide range of Porsche models.
Our gasket sets are ideal for engine rebuilds, overhauls, and preventive maintenance, ensuring long-term dependability and peak performance.
Highlights:
- Complete Porsche engine gasket kits and individual components.
- Precision-engineered for exact sealing performance.
- Constructed from advanced composite, metal, and elastomer materials.
- Resistant to heat, pressure, and chemical exposure.
- Suitable for classic air-cooled and modern water-cooled engines.
- Ensures leak-free operation and lasting reliability.