Description

Unlock the true performance of your twin-turbo BMW V8 with the Untd. Performance Catless Downpipe, designed for N63 and S63-powered models including the 550i, 650i, 750Li, X5, X6, and M variants from 2011 to 2017. By eliminating the restrictive factory catalytic converters, this downpipe unleashes the full potential of your BMW’s 4.4L twin-turbo V8, delivering explosive power gains, a sharper exhaust note, and quicker turbo response.

Key Features:

Full Catless Design for Maximum Flow
The factory cats are replaced with a straight-through 3″ pipe design, dramatically reducing backpressure and allowing your turbos to breathe. This results in faster spool, higher boost efficiency, and a substantial increase in horsepower and torque—especially when tuned.

Aggressive, Deep Exhaust Tone
Removing the cats transforms the exhaust note into something far more aggressive and raw. Expect louder cold starts, deeper growls under throttle, and pronounced turbo spool and crackles that bring out the true character of the N63 and S63 V8s.

Track-Ready, Performance-Driven
Ideal for enthusiasts running high-performance setups or preparing for track use, this catless downpipe provides the foundation for major power gains. It’s the perfect complement to upgraded turbos, intercoolers, and custom tunes.

High-Grade Stainless Steel Construction
Constructed from premium 304 stainless steel, the downpipe is TIG-welded for durability and features CNC-machined flanges to ensure a precise, leak-free fit. Built to withstand the extreme heat and pressure of forced induction V8s.

Bolt-On Installation
Engineered for seamless integration, the downpipe is a direct bolt-on replacement for the OEM units with no cutting or welding required. Compatible with both factory and most aftermarket exhaust systems.

Compatibility:

N63 Engine Models (2011–2017):

• BMW 550i / 550i xDrive

• BMW 650i / 650i xDrive

• BMW 750Li / 750Li xDrive

• BMW X5 xDrive50i

• BMW X6 xDrive50i

S63 Engine Models (2010–2014):

• BMW X5M (E70)

• BMW X6M (E71)

If you’re building a high-output N63/S63-powered machine or simply want to experience the V8’s true potential, the Untd. Performance Catless Downpipe delivers the flow, sound, and performance your BMW deserves.

⚠️ Note: This product is intended for off-road or motorsport use only. Not emissions-compliant in all regions. Check your local laws and regulations before installation.