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Very good sound, quality and looks – an absolute novel product!
Quad Custom Exhaust makes every E90/E91/E92/E93 look like an M3 - made of high quality stainless steal

4x76mm TailPipes - rolled - position like/looks like original M3 - with 2 separat exhaust mufflers


Here for BMW 335i / 335d (based on stock car configuration without tow-bar). All other engines/models: see separat products in this shop.






New: now with inward rolled tips (some photos still show the "old" version with cutted tips):











No bigger modifications have to be made to the car!


With the original M-Technik rear bumber you just need to place our our special inserts/diffusors into your bumber. Available in GFK and Carbon fiber
These inserts/diffusors can also be bought from us! You can navigate to the rear bumber inserts here (you can choose between real Carbon or Fiberglass and different versions)

Soundfiles:
www.insideperformance.de > Soundfiles
The exhaust stream is equal in all four pipes - very sporty sound.


Installation should be done by a professional garage - installation instructions can be found here