BMW 135i SuperSprint Front Connecting Pipe (Replaces Cats)
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These are alternative pipes for the metallic race cats above. After the turbo down pipe outlet flanges, the cross section shrinks down from 65mm to 60mm, (still larger than the factory 57mm tubing size) and it is maintained constant all the way to the tail tips. Once again there are no crushed sections in the tubing as with the factory system for clearance. In place of the factory quad cat design Supersprint has designed 2 straight pipes for race track or export purposes only. Legal only for racing vehicles which may never be used upon a highway. Not applicable or intended for street or highway use.