Description
Upgrade the exhaust flow and turbocharger response of your BMW N55-powered vehicle with the DCE Parts Performance Downpipe, designed for BMW applications equipped with a Pneumatic Wastegate (PWG) turbocharger.
The larger-diameter downpipe reduces exhaust back pressure, allowing the turbocharger to spool more quickly and begin building boost at lower engine speeds. It can also help the turbocharger recover and build boost more rapidly following gear changes, improving throttle response and overall engine performance.
When installed on its own, the downpipe typically provides an estimated gain of approximately 15 HP and 25 Nm, although actual results can vary depending on the vehicle, engine configuration, software, supporting modifications, and operating conditions.
Installing the DCE Parts downpipe can also produce a more aggressive and pronounced exhaust note, giving the vehicle an enhanced performance-oriented sound.
ECU Tuning Required
For proper operation and optimal power output, the vehicle will require ECU remapping/tuning to accommodate the downpipe configuration, particularly when using the catless version. Proper calibration is important to account for the increased exhaust flow and changes to the vehicle's emissions equipment.
The catless downpipe is intended for off-road, race, or motorsport use only and is not suitable for public-road use where prohibited by applicable emissions regulations.
Downpipe Options
DCE Parts offers several configuration options for its downpipes, allowing the exhaust system to be specified according to the desired configuration and appearance.
- Full Straight Decat
- Catalytic Converter Look with an empty catalyst housing
- High-Flow Catalytic Converter
The Catalytic Converter Look option provides the external appearance of a conventional catalytic converter while remaining internally catless. This configuration is intended to provide an OE-style/catted appearance while maintaining the increased exhaust flow and enhanced sound associated with a catless downpipe.
The DCE Parts downpipe can also be equipped with a High-Flow Catalytic Converter for customers requiring a catted configuration.
Performance & Sound
The DCE Parts N55 downpipe is designed to provide both performance and sound improvements. The increased exhaust flow can reduce back pressure, improve turbocharger spool characteristics, and contribute to faster boost response.
The downpipe also produces a more aggressive exhaust sound compared with the factory configuration, making it suitable for performance-oriented builds.
Fitment
This DCE Parts downpipe is designed for the following BMW N55 Pneumatic Wastegate (PWG) applications:
- 2011–2016 BMW 535i & 535Xi F10 & F11 — Pneumatic Wastegate
- 2011–2016 BMW 535i & 535Xi Gran Turismo F07 — Pneumatic Wastegate
- 2011–2017 BMW 640i & 640Xi Gran Coupé — Pneumatic Wastegate
- 2011–2017 BMW 640i F12 & F13 Coupe & Convertible — Pneumatic Wastegate
- 2011–2015 BMW 740i & 740LiX F01 & F02 — Pneumatic Wastegate
- 2009–2013 BMW X5 35iX E70 — 3.5-inch, Pneumatic Wastegate
- 2009–2014 BMW X6 35iX E71 — 3.5-inch, Pneumatic Wastegate
Important Fitment Information
This downpipe is specifically intended for the BMW N55 engine with Pneumatic Wastegate (PWG) applications listed above. Verify the vehicle's model year, chassis code, engine, and wastegate configuration before ordering.
The E70 X5 35iX and E71 X6 35iX applications are specified as 3.5-inch Pneumatic Wastegate configurations.
Important Emissions & Legal Notice
Certain exhaust components and tuning products may alter, bypass, or remove factory emissions-control equipment. Catless downpipes and Catless Catalytic Look downpipes are intended for off-road or motorsport use only and may not be legal for public-road use in your country.
The 200-cell Sport Metallic Catalytic Converter downpipe configuration is suitable for road use in most countries; however, emissions requirements and vehicle regulations vary by location. Customers are responsible for checking applicable local laws and regulations before purchasing or installing the product.
These products may be intended for off-road, race, or competition use only and may not be legal for use on public roads or vehicles registered for street use in the United States. Installation or use of emissions-related products on pollution-controlled vehicles may violate the U.S. Clean Air Act and could result in significant fines or penalties.
It is the buyer's responsibility to ensure that the selected product and its installation comply with all applicable local, state, federal, and national laws and regulations. Use at your own risk.
