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09-16-2018, 11:42 PM | #1 |
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FS: Challenge Street X Pipe w/Original Cats
I am parting ways with my Challenge street X Pipe that has been professionally welded to the original BMW Primary Cats (Catalytic Converters) from my M3. This is x pipe is the street version that Challenge no longer offers and is a great solution to improve the sound on the M3 while not affecting smog rules (at least in CA). Here are the specs from the manufacturer: - Made in the USA - Full stainless steel construction - Laser cut and formed mounting brackets - 2.5 in Piping - Twin resonators for noise and drone reduction - Retains factory primary cats - No check engine light - Flanged design for easy installation and upgrade options - 10 wheel hp and 15 ft tq gains with factory exhaust - Increased low end power I can ship at the buyer's expense. These are packed and ready to go. |
09-17-2018, 03:22 PM | #2 | |
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