$540.00
Unleash the full potential of your BMW M235i or 435i with the Untd. Performance Catless Downpipe w/ Heat Shield. Built for the N55 turbocharged inline-six, this high-performance upgrade eliminates factory restrictions to deliver maximum exhaust flow, quicker turbo spool, and a deep, aggressive sound. Whether you’re carving corners or dominating straightaways, this catless downpipe with integrated heat shielding is engineered to give your BMW the performance edge it deserves.
Available on backorder
Unleash the full potential of your BMW M235i or 435i with the Untd. Performance Catless Downpipe w/ Heat Shield. Built for the N55 turbocharged inline-six, this high-performance upgrade eliminates factory restrictions to deliver maximum exhaust flow, quicker turbo spool, and a deep, aggressive sound. Whether you’re carving corners or dominating straightaways, this catless downpipe with integrated heat shielding is engineered to give your BMW the performance edge it deserves.
Catless Design for Unrestricted Flow
Remove the bottleneck and let your N55 breathe. The Untd. Performance Catless Downpipe replaces the OEM catalytic converter with a free-flowing 3-inch pipe, significantly reducing backpressure and improving exhaust gas velocity. This results in faster turbo spool, more power across the rev range, and a dramatic improvement in overall engine responsiveness.
Integrated Heat Shielding
Purpose-built with a high-quality thermal shield, this downpipe keeps engine bay temperatures in check. The integrated heat shield protects critical components and helps preserve turbo efficiency by minimizing heat soak—especially important for aggressive driving or track use.
Aggressive Sound Profile
Ditch the factory silence. This catless design transforms your BMW’s exhaust note, delivering a deeper, louder tone with sharper turbo whooshes and burbles that showcase the N55’s sporty character. Expect more presence, more growl, and unmistakable performance acoustics.
Enhanced Power & Turbo Response
Thanks to improved exhaust flow and reduced backpressure, this downpipe allows your turbo to spool earlier and hold boost more efficiently. The result? Stronger throttle response, better midrange torque, and increased horsepower. When paired with a tune, gains are even more substantial.
Durable, Track-Ready Construction
Made from TIG-welded 304 stainless steel, the Untd. Performance Downpipe is built to withstand high temperatures and repeated hard driving. CNC-machined flanges ensure a perfect, leak-free fit, while the robust heat shielding ensures performance and protection go hand-in-hand.
Direct Bolt-On Installation
Designed as a direct-fit upgrade, this downpipe bolts seamlessly to your factory turbo and mid-pipe without modifications. Install, tune, and feel the difference instantly.
BMW F22 M235i / M235xi (2014–2016)
BMW F32/F33 435i / 435xi (2014–2016)
✅ Fits models with N55 engine
The Untd. Performance Catless Downpipe w/ Heat Shield is the go-to upgrade for N55 owners looking to amplify power, response, and sound—while maintaining thermal control under pressure. It’s the ultimate combination of performance, protection, and precision fitment.
⚠️ Note: This product is intended for off-road and track use only. Not emissions-compliant for street use in all regions. Please verify local laws before installation.
