QKspl BMW N54 Catted Downpipes

Lose the restrictions and improve response while staying emissions compliant.
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Availability: Expected Ship Date: May 24, 2021
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Product Details

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

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


  • 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


This Part Fits the Following Vehicles

Make Model Submodel Engine
BMW E88 135i N54 3.0L
BMW E90 335i N54 3.0L
BMW E90 335xi N54 3.0L
BMW E92 335i N54 3.0L
BMW E92 335xi N54 3.0L
BMW E93 335i N54 3.0L
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.


ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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