5" Race Catted Downpipe (4" Turbo Flange, Stock Outlet Flange)

Bolt on power with no CEL!
Mfg Part #
ECS Part #
CG Precision
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Availability: Direct Ship, Expected Ship Date: Jun 28, 2021
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Product Details

The DS-1 is a precision engineered hi-flow race catted 5” mandrel bent stainless steel downpipe for the BMW F20/F22/F30/F32 M235i/335i/435i. It is 3D computer designed to minimize bends and maximize flow while maintaining factory-like fitment. It is available with either the smaller 105mm downpipe flange (before 07-2013 build date for the F30 335i) or the larger 118mm downpipe flange (after 07-2013 build date) and either the factory style exhaust connection or the high flow 3.5” (90mm) connection for CG Precision’s VS-1 exhaust system.

Key Features:

  • The only catted downpipe to offer a full 3.5" connection to the exhaust system, resulting in faster turbo spool up and more horsepower*,**
  • Ultra-high flow 200 CPSI race catalytic converter
  • True 5" (127mm) diameter catalyst for 56% less flow restriction and better emissions than 4" sports catalysts used by competitors
  • T304 stainless steel
  • Tig welded with chemical weld passivation for enhanced appearance and corrosion protection
  • 3D computer design and flow simulation with minimized bends and gradual transitions for smooth airflow
  • OEM-like fitment with factory O2 sensor functionality
  • Available for 3.5" (pneumatic wastegate) or 4" (electronic wastegate) turbo connections
  • CNC flanges and precision laser-cut brackets

This Part Fits the Following Vehicles

Make Model Submodel Engine
BMW F30 335i N55 3.0L
BMW F30 335i xDrive N55 3.0L
BMW F32 435i N55 3.0L
BMW F32 435i xDrive N55 3.0L
BMW F33 435i N55 3.0L
BMW F33 435i xDrive N55 3.0L
BMW F34 335i xDrive N55 3.0L
BMW F36 435i N55 3.0L
BMW F36 435i xDrive N55 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.


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Manufacturer names and/or part numbers are used only for identification purposes.

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