Unequal length, 4-1, design for torque and response, This header design has proven results on and off the track. The quality, fit and finish is unlike any other header and atthis price is a steal. At Gruppe-S we have proven dyno numbers. The flanges are perfectly flat, the collector is unparalleled and cannot be compared to any other collector design. This header design is unique in that it allows for expansion without leaking. Lastly the welds on this header are a work of art. Purchase a Gruppe-S Over pipe to maximize power!



Cast collector that is perfect every time

Unequal length header to keep Boxer sound

Improved exhaust efficiency through catless design.

Polished stainless header to resist rusting

Comes with gaskets and hardware for installation



