Active Autowerke Sport Cat Downpipes for BMW S63/N63 Twin-Turbo V8 | E70 E71 F15 F16 F85 F86 | X5 50i, X6 50i, X5M, X6M | GESI UHO High-Flow Catted, 3-inch 304 Stainless, Bolt-On, OBD2 Compliant, No CEL | 11-041

Active Autowerke G-Sport UHO Sports Cats for BMW S63 and N63 V8 SUVs - Part 11-041

Turn your BMW V8 biturbo into a sharper, harder-hitting machine with these performance catalyst front pipes from Active Autowerke. Designed for the X5 50i, X6 50i, X5 M and X6 M across E70 LCI, E71 LCI, F15, F16, F85 and F86 platforms, this premium exhaust upgrade unleashes response, torque and a deeper, richer soundtrack while keeping on-board diagnostics happy. Built from T304 stainless with full 3.0 inch tubing and precision cast V-band connections, this is a high quality, direct replacement cat section that delivers results.

The heart of the system is a pair of 4.5 inch GESI G-Sport UHO ultra high output catalysts. These high flow units are EPA registered, OBD-II friendly and engineered to minimise the chance of a warning light, giving you the performance you want with the drivability you expect. Expect quicker turbo spool, stronger mid-range pull and smooth power delivery, plus a purposeful tone without unwanted cabin boom. Made in Miami, Florida to exacting standards.

Why this exhaust upgrade works

• Lower exhaust restriction for faster spool and sharper throttle feel
• 3.0 inch mandrel bent tubing that supports serious power levels
• G-Sport UHO sports catalysts that play nicely with factory sensors and monitors
• Durable TIG welded T304 stainless construction for long term reliability
• Precision cast stainless V-band inlets for OEM-like alignment and sealing
• Direct replacement cat section that installs without cutting or welding

Technical details

• Ultra high flow 4.5 inch GESI UHO converters, EPA registered, OBD-II compatible
• 3.0 inch diameter pipework for maximum flow and headroom
• Designed to support 500 to 850 hp applications
• Thermal tolerance up to 1500 F, reaches operating efficiency within 9 seconds of start up
• TIG welded 304 stainless with furnace brazed 304 stainless substrate
• 400 CPSI catalyst for excellent conversion with reduced back pressure
• Stainless V-band couplers for repeatable, leak free installation
• Catalyst warranty 5 years or 50,000 miles

Vehicle compatibility

• BMW X5 E70 LCI 50i - N63 V8 - 2010 to 2012
• BMW X6 E71 LCI 50i - N63 V8 - 2010 to 2012
• BMW X6 E71 LCI M - S63 V8 - 2010 to 2012
• BMW X5 F15 50i - N63 V8 - 2014 onwards
• BMW X6 F16 50i - N63 V8 - 2014 onwards
• BMW X5 M F85 - S63 V8 - 2014 onwards
• BMW X6 M F86 - S63 V8 - 2014 onwards

Real world improvements

• Noticeably quicker turbo response and stronger mid-range surge
• Deep, refined exhaust note that suits a performance SUV
• Reduced heat build up thanks to lower exhaust back pressure

Installation

This is a direct fit replacement for the factory catalyst section using the original mounting points and V-band joints. No cutting or welding required. For a flawless result, book professional fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Emissions and compliance

GESI G-Sport UHO converters are EPA registered and OBD-II compatible for 49 states. Not approved by CARB for use in California. Federal law prohibits tampering with emissions control devices. These sports catalysts are designed to help maintain emissions performance but are not CARB certified.

Part number

11-041

What our customers say

Installed and tested by MJ Modifications, feedback has been consistently positive for fit, finish and gains. Owners report quicker spool, a stronger shove through the mid-range and a tasteful exhaust character that enhances everyday driving and spirited use.

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