Heat Exchangers


- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC

Fits:
Porsche 911 1974-84
*If using with 1985 onwards 3.2L you may need 6x 93011119112 42mm bore Manifold gaskets
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PCG91121100
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- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC
- Porsche 911 1984-1986 3.2L

Fits:
Porsche 911 2.7L / 3.0L / *3.2L 08/73-07/85
*If used with 1984 onwards 3.2L you may need 6x 93011119112/1 42mm bore Manifold gaskets
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Related, superseded, cross reference or alternative numbers for comparison.
PCG91121100
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- 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

Are you backdating a 3.2 Carrera or 3.2ltr engine?
Use these SSi heat exchangers to solve the exhaust requirements by deleting the pre-silencer and turning the rear silencer into a "two in, one out" system seen on the early, pre impact bumper cars.
Made using Ø41 mm outside tubing for a better flow and performance these AISI 321/EN4531 titanium stabilized stainless steel heat exchangers offer long life, increased power output and a quality fit.
Price is for a SET OF 2
Fits:
Porsche 911 (Conversion) 3.2ltr 08/1983 - 07/1989
Core Length: 470 mm
Core Width: 760 mm
Core Depth: 380 mm
Outer diameter: 41 mm
LONG LIFE
Made using AISI 321/EN4531 titanium stabilized stainless steel the expected life in the severest road conditions (salt) is 20-30 years.
HIGHER POWER OUTPUTOutput is increased particularly in the low and middle RPM ranges. The design makes power by minimizing intake charge disturbances at valve overlap, and increasing the exhaust gas extraction effect. The volumetric efficiency, and thereby the power output is increased. The SSI headers are significantly improved versions of the basic header design used by Porsche on all normally aspirated six cylinder competition engines.
CARBON MONOXIDE SAFE
Unlike all other aftermarket heat exchangers, the SSI heat exchanger headers are made to minimize the possibility that engine produced acids will internally corrode the enclosed primary tubes, thereby allowing carbon monoxide to enter the passenger compartment. The AISI 304 stainless steel tubing is highly resistant to the by products of combustion. SSI use only one piece primary tubes, eliminating the possibility of hand-made welds cracking, and the resulting carbon monoxide leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1623106810
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- 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
Are you carrying out an engine swap to fit a 964 / 993 3.6ltr to an early 911?
Use these SSi heat exchangers to solve the exhaust requirements by deleting the pre-silencer and turning the rear silencer into a "two in, one out" system seen on the early, pre impact bumper cars.
Made using Ø41 mm outside tubing for a better flow and performance these AISI 321/EN4531 titanium stabilized stainless steel heat exchangers offer long life, increased power output and a quality fit.

IMPORTANT: Major modification needed on engine tin ware when installing on 3,6ltr engines.
Price is for a SET OF 2
Fits:
Porsche 911 (Conversion) 3.6ltr 01/1963 - 07/1989
Core Length: 470 mm
Core Width: 750 mm
Core Depth: 370 mm
Outer diameter: 41 mm
LONG LIFE
Made using AISI 321/EN4531 titanium stabilized stainless steel the expected life in the severest road conditions (salt) is 20-30 years.
HIGHER POWER OUTPUTOutput is increased particularly in the low and middle RPM ranges. The design makes power by minimizing intake charge disturbances at valve overlap, and increasing the exhaust gas extraction effect. The volumetric efficiency, and thereby the power output is increased. The SSI headers are significantly improved versions of the basic header design used by Porsche on all normally aspirated six cylinder competition engines.
CARBON MONOXIDE SAFE
Unlike all other aftermarket heat exchangers, the SSI heat exchanger headers are made to minimize the possibility that engine produced acids will internally corrode the enclosed primary tubes, thereby allowing carbon monoxide to enter the passenger compartment. The AISI 304 stainless steel tubing is highly resistant to the byproducts of combustion. SSI use only one piece primary tubes, eliminating the possibility of hand-made welds cracking, and the resulting carbon monoxide leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1623107110
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- 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
Improve exhaust gas flow using these "big bore" SSi heat exchangers.
Made using Ø41 mm outside tubing for a better flow and performance these AISI 321/EN4531 titanium stabilized stainless steel heat exchangers offer long life, increased power output and a quality fit.

Fits:
Porsche 911 (carb.) Europe 2.0ltr 01/63-07/73
Porsche 911 (carb.) USA 2.0ltr -2.4ltr 08/65-07/71
Porsche 911 (inj.) Europe 2.0ltr - 2.4ltr 08/68-07/71
Porsche 911 (inj.) USA 2.0ltr -2.4ltr 08/68-07/71
Porsche 911 Europe 2.7ltr 08/73-07/75
Porsche 911 Europe 3.0ltr 08/77-07/83
Porsche 911 USA Federal 2.7ltr 08/74-07/75
Porsche 911 USA Federal 3.0ltr 08/77-07/78
Price is for a SET OF 2
LONG LIFE
Made using AISI 321/EN4531 titanium stabilized stainless steel the expected life in the severest road conditions (salt) is 20-30 years.
HIGHER POWER OUTPUT
Output is increased particularly in the low and middle RPM ranges. The design makes power by minimizing intake charge disturbances at valve overlap, and increasing the exhaust gas extraction effect. The volumetric efficiency, and thereby the power output is increased. The SSI headers are significantly improved versions of the basic header design used by Porsche on all normally aspirated six cylinder competition engines.
CARBON MONOXIDE SAFE
Unlike all other aftermarket heat exchangers, the SSI heat exchanger headers are made to minimize the possibility that engine produced acids will internally corrode the enclosed primary tubes, thereby allowing carbon monoxide to enter the passenger compartment. The AISI 304 stainless steel tubing is highly resistant to the byproducts of combustion. SSI use only one piece primary tubes, eliminating the possibility of hand-made welds cracking, and the resulting carbon monoxide leaks.
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91133091911SSI41
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- Porsche 911 1978-1983 3.0L / SC
Price is for a SET OF 2

Fits: USA MODELS
PORSCHE 911 07/77 - 06/80 3.0L Petrol 180bhp 930.03, 930.13
PORSCHE 911 09/79 - 06/80 3.0L Petrol 188bhp 930.09, 930.19
PORSCHE 911 08/80 - 07/83 3.0L Petrol 204bhp 930.10
PORSCHE 911 03/74 - 10/83 3.0L Petrol 209bhp From 1979/08, To 1983/07
LONG LIFE
Made using AISI 321/EN4531 titanium stabilized stainless steel the expected life in the severest road conditions (salt) is 20-30 years.
Output is increased particularly in the low and middle RPM ranges. The design makes power by minimizing intake charge disturbances at valve overlap, and increasing the exhaust gas extraction effect. The volumetric efficiency, and thereby the power output is increased. The SSI headers are significantly improved versions of the basic header design used by Porsche on all normally aspirated six cylinder competition engines.
CARBON MONOXIDE SAFE
Unlike all other aftermarket heat exchangers, the SSI heat exchanger headers are made to minimize the possibility that engine produced acids will internally corrode the enclosed primary tubes, thereby allowing carbon monoxide to enter the passenger compartment. The AISI 304 stainless steel tubing is highly resistant to the byproducts of combustion. SSI use only one piece primary tubes, eliminating the possibility of hand-made welds cracking, and the resulting carbon monoxide leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
1623105110
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

Replace the rusty, steel heat exchangers with these high quality stainless steel SSi units.
Made using AISI 321/EN4531 titanium stabilized stainless steel, these heat exchangers offer long life, increased power output and a quality fit.
Price is for a SET OF 2
Fits:
K-jet (none mechanical injection engines)
911 (carb.) Europe 2.0L 01/63-07/73
911 (carb.) USA 2.0L-2.4L 08/65-07/71
911 (inj.) Europe 2.0L-2.4L 08/68-07/71
911 (inj.) USA 2.0L-2.4L 08/68-07/71
911 Europe 2.7L 08/73-07/75
911 Europe 3.0L 08/77-07/83
911 USA Federal 2.7L 08/74-07/75
911 USA Federal 3.0L 08/77-07/78
LONG LIFE
Made using AISI 321/EN4531 titanium stabilized stainless steel the expected life in the severest road conditions (salt) is 20-30 years.
HIGHER POWER OUTPUT
Output is increased particularly in the low and middle RPM ranges. The design makes power by minimizing intake charge disturbances at valve overlap, and increasing the exhaust gas extraction effect. The volumetric efficiency, and thereby the power output is increased. The SSI headers are significantly improved versions of the basic header design used by Porsche on all normally aspirated six cylinder competition engines.
CARBON MONOXIDE SAFE
Unlike all other aftermarket heat exchangers, the SSI heat exchanger headers are made to minimize the possibility that engine produced acids will internally corrode the enclosed primary tubes, thereby allowing carbon monoxide to enter the passenger compartment. The AISI 304 stainless steel tubing is highly resistant to the byproducts of combustion. SSI use only one piece primary tubes, eliminating the possibility of hand-made welds cracking, and the resulting carbon monoxide leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91133091911SSI
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- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
- Porsche 911 1978-1983 3.0L / SC

Fits:
Porsche 911/911S/Carrera 3.0 1975-77
Porsche 911 SC 1978-83
Click 'zoom in' for large parts diagram.
Diagram ref no 22
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91121155300
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 Chassis 1965-89 Fitted With M64 964/993 3.6L Engine
LONG LIFE
Made from AISI 321/EN4531 titanium-stabilised stainless steel, these heat exchangers are built for durability, with an expected lifespan of 20-30 years in high-salt environments and even longer in milder conditions.
HIGHER POWER OUTPUTDesigned to optimise exhaust flow, these headers improve power output, particularly in low and mid-RPM ranges, by reducing intake charge disturbances at valve overlap and enhancing exhaust gas extraction. SSI headers are a refined version of Porsche’s competition-proven six-cylinder header design.
CARBON MONOXIDE SAFE
Unlike other aftermarket options, SSI heat exchangers are engineered to prevent internal corrosion from engine acids, reducing the risk of carbon monoxide leaks. Constructed from high-quality AISI 304 stainless steel with seamless primary tubes, they eliminate weak weld points that could lead to cracks and leaks.
Related reference numbers
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91133091936SSI
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- 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
- Porsche 964 (911) TURBO 3.6L 1991-93

Novel ultra-high-performance product
• Use of Titanium Ti6Al4V technology
• Extreme perceived quality
Contains 12 x Studs, Nuts & Washers
Fits:
Porsche 911 3.0L SC
Porsche 911 3.2L 1984-89
Porsche 930 turbo
Porsche 965 turbo
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SL-TI-122
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Title: Upgrading Your Porsche with Exhaust Heat Exchangers: Technical Specifications and Benefits
Improved Performance: Upgrading your Porsche's exhaust heat exchangers, whether with an original Porsche or after-market option, can significantly enhance your vehicle's performance. The improved design and materials used in these heat exchangers help to optimize exhaust flow, resulting in increased horsepower and torque.
Efficient Heat Dissipation: Exhaust heat exchangers play a crucial role in dissipating the excess heat generated by your Porsche's engine. Upgrading to high-quality heat exchangers ensures efficient heat dissipation, preventing overheating issues and prolonging the life of your engine.
Enhanced Durability: Original Porsche or after-market exhaust heat exchangers are built using durable materials, such as stainless steel or high-grade alloys. These robust components offer superior resistance to corrosion, heat, and vibrations, ensuring long-lasting performance and reliability.
Emissions Compliance: Upgrading your Porsche's exhaust heat exchangers can help your vehicle comply with emissions regulations. Many aftermarket options are designed to meet or exceed emission standards while maintaining optimum performance levels.
Precise Fitment: When purchasing exhaust heat exchangers for your Porsche, it is crucial to ensure they are specifically designed to fit your vehicle model and engine type. This ensures a seamless installation process and optimal functionality.
At Design911, we specialize in providing high-quality Porsche parts, including original Porsche and after-market exhaust heat exchangers. Our extensive inventory and knowledgeable staff allow us to help you find the correct part for your Porsche model. We offer professional advice, ensuring you make an informed decision based on your specific requirements. Trust us to provide the best solutions to upgrade or replace your Porsche's exhaust heat exchangers, improving performance, durability, and overall driving experience. Contact us today to explore our range of Porsche parts and benefit from our expertise.