cp-e™ QKspl™ BMW N54 Downpipes

From: $696.99

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cp-e™ cast stainless downpipes have been designed specifically for the n54 motors to reduce back pressure and optimize exhaust flow.

Catted version currently on Backorder.

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Product Description

BMW N54 Downpipes

Eliminating restrictions in the exhaust system is key to increasing efficiency and power. Back pressure causes delayed turbocharger response and is a bottleneck.

BMW N54 Downpipes FEATURES

  • CAM/CAD Engineering
  • Full 304 Stainless construction
  • Cast bellmouths for smooth transitions
  • Mandrel bent tubing
  • Laser cut flanges
  • TIG welded
  • Available with High Flow Catalytic converters
  • Optional Wideband O2 bungs available
  • Made in the USA
  • Lifetime Warranty

cp-e™ cast stainless downpipes have been designed specifically for the n54 motors to reduce back pressure and optimize exhaust flow.

+12whp +10wtq
CAD designed castings channel the gas from the twin turbos into mandrel bent tubing – as a result there are no harsh bends or transitions restricting flow. Made completely of high grade 304 Stainless steel, the system is strong and durable.

The ultra-precise fitment of the downpipes is the result of painstaking attention to detail and the utilization state-of-the-art manufacturing equipment. cp-e™ utilizes the latest in 3-D digitizing and reverse-engineering tools, and also take advantage of robotic cutting and welding systems to reduce the influence of human error. These tools ensure that each example is true to the original prototypes, which guarantees ideal fitment each and every time.

The downpipes may be installed without any permanent modifications, and are available with or without high-flow catalytic converters and additional wideband oxygen sensor bungs.

While this may not trip a Check Engine Light, we cannot guarantee that all of the codes will be in the “ready” state. Check engine light will depend on your particular setup, tune, and other vehicle modifications.

Additional Information

Weight 22 lbs
Dimensions 22 x 22 x 8 in
5.00 out of 5

4 reviews for cp-e™ QKspl™ BMW N54 Downpipes

  1. 5 out of 5


    I had a very good experience with the customer support. 135i Downs Pipes fit and finish were top notch and install and fitment were good , a bit tight but flange fit was perfect.
    Made in USA by true professionals.

    Mark W. 6/2013

  2. 5 out of 5

    (verified owner):

    Installed a week ago on a 335xi with jb4 etc. Note that the 335xi installation is a bit more involved than normal RWD. Need to lower the subframe with engine supported. In the end they fit perfect, and no CEL.

  3. 5 out of 5

    (verified owner):

    Best one for the price. I prefer mandrel bent over welded and this one is the best quality I’ve seen

  4. 5 out of 5

    (verified owner):

    Best quality downpipes I’ve seen out there. I love that they are mandrel bent instead of welded

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