Active Autowerke BMW S63 Sport Cat Downpipes for F90 M5 and F91 F92 F93 M8
Unlock serious performance from your twin turbo S63 with the Active Autowerke Sport Cat Downpipe set for BMW F90 M5 and F91 F92 F93 M8. If you are searching for BMW M5 downpipes, BMW M8 downpipes, S63 downpipes, S63TU catted downpipes, sport cat downpipes or high flow GESI catted downpipes for your M5 or M8, this is the premium, bolt-on upgrade engineered for power, response and reliability.
Built from 304 stainless steel and TIG welded for strength, these Active Autowerke downpipes massively reduce factory back pressure, cut radiant heat and deliver quicker turbo spool with stronger torque and horsepower right through the rev range. The design uses a factory matched 3.5 inch V-band inlet, tapers to a high-flow mandrel bent body and includes the lower section many brands sell separately as a mid-pipe. Fitment is precise, installation is straightforward and you keep a stock-looking engine bay because the OEM O2 sensor heat shields can be retained for a true sleeper look.
This sport cat version integrates a pair of 4.5 inch GESI G-Sport Ultra High Output high flow catalytic converters. They are OBD2 compliant, EPA registered for 49-state use and engineered to prevent a check engine light. Rated for 500 to 850 hp applications, these converters flow significantly better than stock, withstand extreme heat and reach operating efficiency quickly, so you get performance gains without the usual downsides.
Why choose these BMW M5 M8 S63 sport cat downpipes
- Real performance upgrade for BMW F90 M5 and BMW F91 F92 F93 M8 S63 twin turbo V8
- High flow catted downpipes that reduce back pressure and turbo lag for faster spool
- Noticeable gains in torque and horsepower across the powerband
- No CEL when using this downpipe configuration
- Sleeper look under the bonnet with OEM O2 heat shield compatibility
- Ultra durable 304 stainless steel, TIG welded, with cast stainless V-band for OEM-like fit
- Includes the lower section others list as a separate mid-pipe
- Trusted Active Autowerke quality, made in Miami, Florida
Key features and specifications
- Part Number: 11-063
- 4.5 inch diameter high flow GESI G-Sport UHO catalytic converters
- Ultra high flow 400 CPSI catalyst with proprietary precious metal loading
- EPA registered and OBD2 compliant for 49 states, not CARB approved
- Rated for 500 to 850 hp applications
- Withstands exhaust gas temperatures up to 1500 F
- Reaches operational efficiency within approximately 9 seconds of start-up
- Factory matched 3.5 inch V-band inlet, mandrel bent body
- Accepts OEM O2 sensor heat shields for stock appearance
- Bolt-on fitment, no cutting or welding required
- Durable TIG welded 304 stainless steel construction
- Precise fitment for F9X chassis
- Catalytic converter covered by a 5 year or 50,000 mile warranty
Compatibility
- BMW M Series F90 M5 2016 to 2019
- BMW M Series F90 LCI M5 2021 onwards
- BMW M Series F91 M8 Convertible 2018 onwards
- BMW M Series F92 M8 Coupe 2018 onwards
- BMW M Series F93 M8 Gran Coupe 2018 onwards
Nforcd recommendation
We rate these Active Autowerke S63 sport cat downpipes highly. We have fitted them for customers and on our own projects and the feedback is consistently excellent: stronger mid-range, faster spool, great drivability and top-tier build quality. If you want the best BMW M5 downpipe or BMW M8 downpipe upgrade with high flow cats and no dashboard drama, this is the one.
Installation and fitting
This is a direct bolt-on downpipe kit. For professional installation, contact Nforcd in Warwickshire for a fitting quote. Email Sales@nforcd.com to book or request pricing.
Emissions and legality
GESI UHO catalytic converters are EPA registered and OBD2 compliant for 49-state use. Not legal for vehicles registered in California. Federal law prohibits tampering with emissions control devices. Mobile Source Enforcement Memorandum 1A permits aftermarket parts for repair or replacement provided emissions performance is not adversely affected. GESI converters meet EPA standards, not CARB.
Search-friendly keywords
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