Description

Take your BMW X5M or X6M to the next level with the Untd. Performance Slip-Fit Catless Downpipe—engineered for the brutal power and precision of the S63 4.4L twin-turbo V8. This version features a slip-fit connection for easier installation and maximum flow, removing restrictive factory components to dramatically improve throttle response, turbo spool, and exhaust tone. Whether you’re building a track machine or an aggressive street setup, this is the upgrade built to deliver unfiltered performance.

Key Features:

Slip-Fit Catless Design
Designed with a slip-fit outlet for smoother installation and enhanced alignment, this downpipe eliminates the OEM catalytic converters for maximum exhaust flow and reduced backpressure—ideal for high-boost, high-power builds.

Raw and Aggressive Exhaust Tone
Without factory cats dulling the sound, your S63’s twin-turbo V8 comes to life with a deeper, louder, and more visceral growl. Expect sharper turbo whistle, harder crackles, and a sound that commands attention on the street or the strip.

Power Gains You Can Feel
Optimized for turbo efficiency and peak performance, this downpipe helps reduce lag and delivers faster throttle response, improved low-end torque, and stronger top-end horsepower. It’s performance you can feel in every gear.

Durable Stainless Steel Construction
Made from high-grade 304 stainless steel with TIG welds and precision CNC flanges, the Untd. Downpipe is built to withstand intense heat and pressure. It’s engineered for longevity and performance under extreme driving conditions.

Track-Ready Fit and Function
This downpipe bolts directly to the stock turbo and mid-pipe system via a slip-fit connection, simplifying the installation process and improving flexibility during tuning or future upgrades. Perfect for race builds, dyno tuning, or off-road applications.

Compatibility:

• BMW X5M F85 (2015–2018)

• BMW X6M F86 (2015–2019)

• Engine: S63 4.4L Twin-Turbo V8

Whether you’re chasing dyno numbers or looking to wake up your M-powered SUV, the Untd. Performance Slip-Fit Catless Downpipe delivers unrestricted flow, race-inspired sound, and the boost response your S63 deserves.

⚠️ Note: This product is intended for off-road and track use only. Not emissions-compliant in all regions. Please check local regulations before installation.