$540.00
Elevate your BMW N55’s performance with the Untd. Performance Catted Downpipe. Purpose-built for enthusiasts who want more power, faster spool, and a throatier exhaust tone—without the full commitment of a catless setup—this high-flow catted downpipe delivers serious gains while maintaining a more emissions-conscious design. Perfect for daily-driven builds, weekend warriors, and tuned street machines.
Available on backorder
Unleash real-world performance from your BMW N55 engine with the Untd. Performance Catted Downpipe, designed specifically for the F22 M235i, F30 335i, and F32 435i platforms. Whether you drive an M235i, M235xi, 335i, 335xi, 435i, or 435xi, this high-flow, emissions-conscious downpipe upgrade unlocks serious horsepower, turbo response, and an exhaust note that truly reflects your BMW’s performance potential—while retaining a streetable setup.
High-Flow Catted Design for Everyday Power
Say goodbye to restrictive OEM components. The Untd. Performance Downpipe features a 200-cell high-efficiency catalytic converter that drastically improves exhaust flow compared to the factory unit found in the F22 M235i, F30 335i, and F32 435i. This results in reduced backpressure, allowing your turbocharged inline-six to breathe freely, spool faster, and generate more power—without the full emissions delete of a catless system.
Aggressive, Refined Sound for the Street
From the moment you start your M235i or 435xi, you’ll notice a richer, deeper tone. The upgraded catted system enhances your exhaust note without excessive drone, delivering turbo spool, burbles, and a motorsport-inspired edge that stays tasteful on the street.
Dyno-Proven Performance Gains
With improved exhaust velocity and reduced thermal load, your N55-powered 335i or 435i benefits from noticeably quicker throttle response, stronger midrange torque, and increased peak horsepower—especially when paired with ECU tuning. Expect a more responsive feel whether you’re accelerating off the line or powering through a canyon road.
Built for Boosted Performance
Crafted from TIG-welded 304 stainless steel and built to withstand high temperatures and boost pressures, this downpipe is engineered for durability. CNC-machined flanges ensure a tight, precise fit on all compatible N55 models, including the F22 M235xi and F30 335xi.
Easy Bolt-On Fitment
Designed as a direct replacement for your stock downpipe, installation is straightforward—no cutting or welding required. Compatible with factory mid-pipes and most aftermarket exhaust systems, making it a seamless upgrade for your 2013+ N55-powered BMW.
BMW F22 M235i / M235xi (2014–2016)
BMW F30/F31 335i / 335xi (2012–2015)
BMW F32/F33 435i / 435xi (2014–2016)
✅ For N55 engines with PWG (Pneumatic Wastegate). Not directly compatible with EWG (Electronic Wastegate) models unless additional modifications are made.
Whether you’re tuning your M235i for weekend sprints or daily-driving your 335xi with a bit more bite, the Untd. Performance Catted Downpipe is the perfect upgrade to get more sound, more spool, and more power—while keeping things emissions-conscious and street-friendly.
⚠️ Note: This downpipe includes a high-flow catalytic converter, but it is not guaranteed to be emissions-compliant in all jurisdictions. This product is intended for off-road or motorsport use. Check your local laws and regulations before installation.
