Stainless Steel Heat Exchanger Set for Porsche 911 (1965-1989) Chassis With 964/963 M64 3.6L Engine

Set of 2 stainless steel heat exchangers for Porsche 911 (1965-1989) chassis fitted with the M64 3.6L engine from Porsche 964 and 993 models. This setup eliminates the side and center silencers, converting the rear silencer into a "two in, one out" system, reminiscent of early pre-impact bumper cars.

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Related, superseded, cross reference or alternative numbers for comparison.

91133091936SSI

The product you are viewing cross references to these numbers