V2 63.5mm performance exhaust systems
by Supersprint Srl
Build Journal: Special Series
The rasp, and the restriction.
The S54 is known for many great aspects: exhaust sound isn't one of them.
We cheered for companies making louder exhausts without rasps.
The bar was low.
2001 was an era where Americans had catalytic converts and Europeans didn't.
As CSL airbox conversions, cams and tuning were unlocked, new levels of power were found within the S54.
The exhaust became a bottleneck. Times does its time: technology and expertise evolves.
In this Special Series, I document sourcing, fitting and experiencing the 63.5mm Supersprint complete exhaust system.
Enjoy,
- Matt / @m3_epoustouflant
63.5mm Stepped Design Headers
Stepped designs are perfectly suited for the S54's long duration cam with lots of overlap and early exhaust valve opening events. The increased diameter allows for addtional exhaust flow.
63.5mm HJS Motorsport Catalytic Converters.
They use a stainless steel catalyst with a 100 CPSI for optimized gas flow. Supersprint positioned the cats much further downstream to reduce operating temperatures and prolong their life. Catless options are available.
Fits with OE sensors
Bungs for pre-cat, post-cat and temperature sensors were cut, fitted and welded to the headers.
63.5mm Twin tube mid sections.
The twin tube design allows to achieve the 63.5mm overall surface area. The resonator selection will dictate rasp levels.
Rear sections dictate sound levels.
From mildest to loudest, and heaviest to lighest: choose from Street, Sport and Race.
Spec your exhaust system
Specifications
- Hand Made in Italy
- 304 ASIS Stainless Steel
- HJS CUP catalytic converters used on "catted" systems.
- TIG welding on headers and section 1.
- MIG welding on Section 2 and Rear Sections.
- Lifetime warranty
Available Configurations
There are many configurations available for the E46 M3 for enthusiasts to mix and match to achieve their desired performance, sound, and weight targets.
| Packages | Content |
| Complete Catted Race Kit |
|
| Complete Catless Race Kit |
|
| Complete Catted Sport Kit |
|
| Complete Catless Sport Kit |
|
Notes on hardware.
As a rule of thumb, Supersprint does not include installation hardware.
You will need to source new gaskets and bolts if you wish to replace them.
The exceptions are on exhaust sections that are not using the OEM configuration such as the twin-tube section 2.
Made in italy since 1955
The GOAT never rests.
Supersprint has been leading E46 M3 exhaust development since the early 2000s and haven't stopepd since.
They were the first to develop and market the stepped header configuration.
It's a unique engineering innovation to enhance power gains across all RPM, with no sacrifice to low and mid range torque often associated with oversized headers.
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