$1,690.00
Enhance your BMW M850i, X5M/X5 G05, or M550i G30 4.4L N63R V8 with the Untd. Performance Catted Downpipe (Primary + Secondary) V2 with Heat Shield. Designed to replace the restrictive factory primary and secondary downpipes, this system features high-flow catalytic converters for optimized turbo efficiency and performance gains.
Available on backorder
Upgrade the performance and reliability of your N63R-powered BMW with the Untd. Performance Catted Downpipe (Primary + Secondary) V2 with Heat Shield, designed for the M850i (G14/G15/G16), X5M/X5 (G05), and M550i (G30). This high-performance V2 downpipe system replaces the restrictive factory primary and secondary downpipes while maintaining emissions compliance with high-flow catalytic converters. The integrated heat shield protects surrounding components from extreme temperatures, making it a perfect street or track upgrade.
Featuring high-flow cats in both primary and secondary sections, this V2 downpipe reduces backpressure while staying emissions-friendly in applicable regions. Expect quicker turbo spool, improved throttle response, and noticeable horsepower and torque gains across the RPM range.
The included heat shield lowers engine bay temperatures, protecting sensitive components and ensuring consistent performance even under aggressive driving conditions.
Transform your BMW’s refined factory tone into a deeper, more commanding exhaust note. Enjoy pronounced turbo spool, subtle crackles, and a performance-focused V8 sound without overwhelming cabin drone.
Built from high-quality stainless steel with TIG-welded joints and CNC-flanged connections, the V2 downpipe provides leak-free fitment and long-term durability under high heat and pressure.
Engineered to perfectly mate with factory turbochargers and stock exhaust routing, installation requires no cutting or welding, delivering a clean, OEM-like fit with maximum performance benefits.
BMW M850i (G14/G15/G16) – N63R 4.4L Twin-Turbo V8
BMW X5M/X5 (G05) – N63R 4.4L Twin-Turbo V8
BMW M550i (G30) – N63R 4.4L Twin-Turbo V8
Upgrade your factory downpipes with the Untd. Performance Catted Downpipe (Primary + Secondary) V2 with Heat Shield for improved flow, faster spool, heat protection, and a deeper, more aggressive exhaust note.
⚠️ Note: While designed for street use in some areas, check local regulations. Approved for off-road and motorsport use in all regions.
