Description
Designed specifically for the BMW S58 platform, this full 3″ catless downpipe provides a significantly freer-flowing exhaust path by eliminating the restrictive factory catalytic converter. The increased diameter and catless design help reduce backpressure, improve turbocharger response, and deliver a more aggressive exhaust note.
Key Features
Full 3″ Catless Design – Maximum Flow:
Featuring a full 3″ diameter design, the Untd. Performance downpipe provides a less restrictive path for exhaust gases while eliminating the factory catalytic converter. The increased exhaust flow can help reduce backpressure and improve turbocharger efficiency.
Improved Turbo Response & Performance:
The freer-flowing 3″ downpipe allows the S58 twin-turbochargers to expel exhaust gases more efficiently. When paired with the appropriate ECU calibration, this can help improve turbo spool, throttle response, horsepower, and torque.
Aggressive S58 Sound:
Let the S58’s twin-turbocharged character come alive. The 3″ catless design produces a louder, deeper, and more aggressive exhaust tone while making turbo spool and exhaust notes more pronounced.
Premium Stainless Steel Construction:
Manufactured from high-quality stainless steel and engineered to withstand the extreme temperatures and pressures produced by the S58 engine. Precision TIG-welded construction provides excellent durability for both performance and enthusiast applications.
Direct-Fit / Bolt-On Design:
Designed specifically for compatible BMW G80, G82, and G87 S58 applications, providing a straightforward installation with compatible OEM or aftermarket exhaust components.
Tune Recommended / Required for Optimal Performance:
An ECU tune is strongly recommended and may be required when installing a catless downpipe. Proper calibration allows the S58 engine and turbochargers to take full advantage of the increased exhaust flow provided by the 3″ downpipe.
⚠️ Check Engine Light Warning
A Check Engine Light (CEL) may occur after installing this catless downpipe due to the removal of the factory catalytic converter and the resulting change in exhaust emissions readings.
A compatible ECU tune is recommended and may be required to properly calibrate the vehicle for the catless downpipe and address catalyst-efficiency-related fault codes. Tune requirements can vary depending on the vehicle, model year, ECU software, existing modifications, and emissions equipment.
For optimal performance, drivability, and compatibility, professional ECU tuning is recommended.
Why Upgrade?
The factory S58 downpipe system incorporates catalytic converters designed for emissions control, which can create additional restriction in the exhaust system.
Replacing the factory downpipes with the Untd. Performance 3″ Catless Downpipe allows the S58 twin-turbochargers to breathe more freely by reducing exhaust backpressure and increasing exhaust flow.
When combined with proper ECU tuning and supporting modifications, the 3″ Untd. Performance Catless Downpipe provides an excellent foundation for extracting additional performance from BMW’s S58 engine while delivering a significantly more aggressive exhaust experience.
Compatibility
- BMW M2 G87 – S58 – 2023+
- BMW M3 G80 – S58 – 2021+
- BMW M3 Competition G80 – S58 – 2021+
- BMW M4 G82 – S58 – 2021+
- BMW M4 Competition G82 – S58 – 2021+
- BMW M4 G83 Convertible – S58 – 2021+
- BMW S58 3.0L Twin-Turbo Inline-6
Fitment may vary depending on model year, market, ECU software, emissions equipment, and existing exhaust modifications. Please verify compatibility before ordering.
⚠️ Important Notice
CATLESS / OFF-ROAD USE ONLY: This product eliminates the factory catalytic converter and may not be legal for use on public roads in your jurisdiction. Check your local emissions, inspection, and vehicle regulations before installation.
A Check Engine Light may occur without appropriate ECU calibration. A compatible tune may be required for proper operation and optimal performance.
Untd. Performance is not responsible for emissions compliance, inspection requirements, or the legality of installing or operating this product on public roads.
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