CARGRAPHIC

Constructed  entirely of AISI 304/321 stainless steel

State of the art header design
All six primary tubes are equal in centerline length to 7,9mm absolute, vs
original equipment variances of 95,3mm. All tubing is three ball mandrel
bent to aircraft tolerances on computer controlled tube benders to assure
consistent tube inside diameters. Gas flow rates exceed O.E. by 9,8%
and are balanced within 1,7%. All turbulence inlcuding compound bends
have been eliminated from the design.

One piece header primary tubes
Primary header tubes contained in the heat exchanger ducting are made of
one piece eddy current tested AISI 304 stainless steel tubing. There are no
internal weld joints made during fabrication.

Highly functional ducting
Heater ducting is precisely formed of low thermally conductive 0,75mm
AISI 304 stainless steel. It is carefully fitted to the header heat source
to minimize leakage. The identical  alloy ducting and header materials
have like thermal expansion rates which prevent stretching and loosening
of the ducting on the headers.

Benefits:

Long life
Expected life in the severest conditions (road salt) is 20-30 years.

Higher power output
Output is increased particulary 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 higly resistant to the byproducts of
combustion. We use only one piece primary tubes, eliminating the possibility
of hand-made welds cracking and the resulting carbon monoxide leaks.

More heat, faster and no rattles
Radiated heat loss is reduced 46% due to the low thermal conductivity of
the ducting. Operating temperature is reached 42% faster. Heat loss due
to leakage is reduced to near zero. The passenger compartment will warm
up faster and to a higher temperature. The defroster will clear the windshield
in slightly more than half time previously required.
Thermocycle will not loosen the ducting and create leakage and ducting rattles.

Reduced installation time, enhanced vehicle value
SSI heat exchangers fit perfectly. Installation time and costs are reduced.
The will never need to be replaced, as they will outlive the vehicle on which
they are installed. Their unequalled quality, performance and longevity will
enhance the value of a Porsche throughout its life.

Consisting of:
– SSI heat exchanger pair, stainless steel.
For cars without petrol pump heating