MotiveWerks
MotiveWerks 4.5" Catless Downpipe – BMW B58
MotiveWerks 4.5" Catless Downpipe – BMW B58
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Unlock your BMW’s full potential with the 4.5" Turbo Catless Downpipe, precision-built for B58 3.0L turbocharged engines. Designed to dramatically improve exhaust flow and turbo response, this high-grade stainless steel downpipe delivers major performance gains, an aggressive sound, and a true enthusiast driving experience.
Key Features:
- Material: Premium stainless steel for durability and corrosion resistance
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Performance Boost:
➔ +15–25 HP without a tune
➔ +40–60 HP with tuning (Stage 2 recommended) - Aggressive Sound: Deeper, louder, and sportier exhaust tone
- Direct Fit Design: Bolt-on installation using OEM mounting points — no modifications needed
- Track/Off-Road Use Only: Catless design maximizes flow (check local emissions laws before installing)
- Note: A check engine light may occur. ECU tuning/remap is strongly recommended for best results.
- Compatible with all gen 1 & 2 B58 BMWs
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So there matches perfectly for an m240i 2017, just think about removing it from the connection level to your original line because it tends to be tightened compared to the tightening necklace otherwise nothing to say and nothing to say.
Fits amazingly on G31 540i Touring. Good quality, doesn’t sound like a tin can. Feels like proper quality. 5 stars, will recommend to others!!

ABOUT US
At MotiveWerks, we specialize in high-quality carbon fiber parts, performance exhaust systems, and premium accessories for BMW enthusiasts. Every product is sourced from trusted manufacturers to ensure top-tier quality, durability, and fitment. Whether you're upgrading your aerodynamics, exhaust, or interior, we offer secure payments, fast shipping, and dedicated support. Join the MotiveWerks community and take your BMW to the next level.