Unleash the full performance potential of your BMW N63-powered vehicle with the Untd. Performance Catless Downpipe. Designed for the 4.4L twin-turbo V8, this downpipe removes restrictive factory catalytic converters to dramatically improve exhaust flow, turbo response, and overall power. Whether you’re building a high-output street car or prepping for track use, this downpipe brings out the true character of your BMW’s twin-turbo V8.
Key Features:
Free-Flowing Catless Design
By eliminating the stock catalytic converters, this downpipe maximizes exhaust velocity and minimizes backpressure. The result is quicker turbo spool, more immediate throttle response, and noticeable horsepower and torque gains—especially when paired with tuning.
Aggressive, Raw Exhaust Note
The catless setup transforms your N63’s exhaust tone into something far more visceral and motorsport-inspired. Expect louder, deeper sound with more turbo whistle, crackles, and pops—making your driving experience far more exciting.
Enhanced Turbo Spool & Throttle Response
With less restriction in the exhaust path, turbos spool faster and operate more efficiently. The improved airflow results in sharper acceleration and more linear power delivery throughout the rev range.
Robust 304 Stainless Steel Construction
Constructed from high-quality 304 stainless steel, the downpipe is built to withstand extreme heat and pressure. TIG welding and precision flanges ensure strength, durability, and a perfect, leak-free fitment.
Direct Bolt-On Fitment
No cutting or fabrication required—this catless downpipe is engineered for a direct OEM-replacement fit. It connects easily to factory turbos and exhaust components, making installation smooth and straightforward.
Compatibility:
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BMW 550i (F10, G11)
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BMW 650i (F06, F13)
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BMW 750i / 750Li (F01, G11)
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BMW X5 / X5 xDrive50i (F15)
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BMW X6 / X6 xDrive50i (F16)
Engine: N63 4.4L Twin-Turbo V8 (N63 & N63TU)
Whether you’re chasing dyno numbers or looking for a more engaging daily drive, the Untd. Performance Catless Downpipe for N63-powered BMWs delivers the sound, power, and throttle response to match your expectations.
⚠️ Note: This product is intended for off-road or track use only. It is not emissions-compliant in all regions. Please check your local regulations before installation.
