Active Autowerke BMW S58 F97 F98 Sport Cat Downpipe for X3 M and X4 M
The must-have BMW S58 downpipe upgrade for F97 X3 M and F98 X4 M owners looking for more power, sharper throttle response and quicker turbo spool. This Active Autowerke sport cat downpipe with GESI high flow catalytic converters delivers a significant reduction in back pressure, a deeper performance tone and outstanding reliability, all while designed to avoid a Check Engine Light. If you are searching for BMW X3 M downpipe, BMW X4 M downpipe, S58 sport cat downpipe, catted downpipe, GESI downpipe, or Active Autowerke downpipe 11-070, you are in the right place.
Built around a 3 inch 304 stainless steel design that smoothly transitions to the OEM 70 mm system, this premium X3M and X4M downpipe is engineered for flow, durability and a precise OEM-like fit. The pair of 4.5 inch GESI G-Sport Ultra High Output catalysts are OBD2 compliant and EPA registered in 49 states, designed to dramatically reduce emissions and eliminate most CELs, making this one of the best high flow, emissions-friendly performance downpipes available for the BMW S58 platform.
Our team has been consistently impressed by the quality, fitment and results from Active Autowerke, and customer feedback on this S58 sport cat downpipe has been excellent. Expect quicker turbo spool, a stronger mid-range and a more engaging sound without drone, all from a true bolt-on solution for your X3 M or X4 M.
Key Features and Benefits
- No CEL when using this downpipe
- GESI G-Sport Ultra High Output high flow catalytic converters, EPA registered and fully OBD2 compliant
- 3 inch primary tubing, transitions to OEM 70 mm, never smaller than stock
- 4.5 inch diameter GESI high flow cats for maximum performance with reduced back pressure
- Quicker turbo spool, improved throttle response and increased power potential
- Casted upper stainless V-band for precise fitment and leak-free sealing
- Accepts OEM BMW lambda O2 sensors and OEM O2 sensor heat shield
- Durable TIG-welded 304 stainless steel construction with stainless flex joints
- Rated for engines producing 500 to 850 horsepower
- Withstands up to 1500 F, reaches operating efficiency within 9 seconds of start-up
- Ultra high flow 400 CPSI catalyst, designed for forced induction with no loss of horsepower
- Direct bolt-on installation, no cutting or welding required
- Made in Miami, Florida
Why upgrade your S58 downpipe
The BMW S58 turbochargers are limited by exhaust back pressure from the restrictive factory downpipes. A larger, smoother-flowing, high quality sport cat downpipe reduces this back pressure so your turbos spool faster and your engine breathes better. The result is stronger performance across the rev range and a more rewarding driving experience. Active Autowerke designed this system to minimise bends, maximise flow and maintain daily drivability.
Technical Highlights
- Primary tube diameter: 3 inch, smooth transitions to OEM 70 mm
- Pair of 4.5 inch GESI UHO high flow catalytic converters
- 304 stainless steel substrate, furnace brazed for durability
- Stainless steel flex joints for longevity and vibration control
- Precise CNC cast V-band flange for OEM-like fitment
Compatibility
- BMW X3 M F97, 2019+
- BMW X4 M F98, 2019+
Part Number
11-070
Fitting and Support
Professional installation recommended. Nforcd offers full fitting services in Warwickshire. Request a fitting quote at Sales@nforcd.com and our team will be happy to help.
Emissions and Compliance
- EPA registered and OBD2 compliant in 49 states
- Not legal for use on vehicles registered in California
- Designed to avoid triggering a Check Engine Light when installed correctly
- Federal law prohibits tampering with emissions control devices. GESI converters are engineered to meet or exceed EPA standards, not CARB
Warranty
5 Year or 50,000 Mile warranty on the catalytic converters.
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