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Very good sound, quality and looks – an absolute novel product!
Quad Custom Exhaust makes every BMW E82/E88 coupe and convertible look like an M-series M1 - made of high quality stainless steal
4x76mm Pipes - looks like original M3 / M1
Fits all BMW E82/E88 stock cars without tow-bar.
118d / 120d (M47)
123d (N47S) (connecting-pipe here not with clamp - has to be welded)
118i / 120i (N43)
118i / 120i (N46N)
125i (N52N)
128i (USA only N51)
135i (N54)
Currently this system is available for all listed models above with installation in our garage. These products are also approved for shippment and self-installation in your local and professional garages of your choice!
Here on an 123d and 125i:

Here an 125i:

Here an 120d:

You can choose between inward rolled tips (see above) or normal tips (see below). Please specify during the order process in the comment field if you prefer "normal" or "rolled" tips.
Here an 135i:




No bigger modifications have to be made to the car!
With the original M-Technik rear bumber you just need to place our special inserts/diffusors into your bumber. Available in GFK (Fiberglass) 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
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