Evolution Racewerks ER Catless Primary Downpipes for BMW X3M F97 and X4M F98 S58
Unlock serious performance from your BMW X3M or X4M with Evolution Racewerks ER Catless Primary Downpipes. Designed for the twin turbo S58 engine, these catless downpipes remove the restrictive primary catalytic converters to maximise exhaust flow, improve throttle response and deliver faster turbo spool. Perfect for drivers looking for a proven BMW X3M downpipe upgrade or BMW X4M downpipe upgrade that fits right and performs immediately.
We have used these ER downpipes on our own cars and customer builds with fantastic results. Expect a noticeably stronger, earlier and longer torque curve, a higher peak power potential, crisper throttle response and an enhanced exhaust note. ER’s precision fabrication, 3 inch mandrel bent stainless steel and CNC machined V-band flanges ensure excellent fitment and durability on the road and at the track.
Key Features and Benefits
- Direct fit for 2019+ BMW F97 X3M and F98 X4M including Competition models with the S58 engine
- Catless primary downpipes replace the factory primary catalytic converters for maximum flow
- Higher max horsepower potential and a stronger, faster-rising torque curve
- Quicker turbo spool and sharper throttle response
- 3 inch mandrel bent tubing with smooth transition to the exhaust system
- 100 percent stainless steel construction and 100 percent TIG welded
- Precision CNC machined turbocharger V-band flanges
- Retains factory slip-on style connection for easy installation
- Compatible with factory exhaust and aftermarket exhaust systems
- Track tested durability and includes all required installation hardware
- Available in Brushed, Polished or Black Thermal Coated finishes
- Limited Lifetime Warranty from Evolution Racewerks
Finish Options
- Brushed finish for a clean motorsport look
- Polished finish for a show-quality shine
- Black Ceramic Thermal Coating to help reduce under-bonnet temperatures, improve exhaust gas velocity and add extra corrosion resistance – rated to 2000°F
Why choose ER Catless Downpipes for BMW X3M and X4M
The factory catalytic converters use dense honeycomb cores that create significant backpressure and turbulence. Replacing the primary cats with ER’s free-flowing 3 inch stainless steel downpipes reduces restriction and lets the S58 breathe properly. The result is a more responsive BMW X3M or X4M, stronger mid-range punch, improved power up top and a more aggressive exhaust tone. If you are shopping for BMW S58 catless downpipes, BMW X3M downpipe UK, BMW X4M downpipe UK or F97 F98 downpipes, these ER units are an outstanding choice for performance, quality and fitment.
Compatibility
- BMW 2019+ F97 X3M including Competition
- BMW 2019+ F98 X4M including Competition
- Only fits non-OPF/GPF models. For OPF/GPF vehicles, select the ER OPF/GPF Catless Primary Downpipes variant.
Part Numbers
- BM-EXH025S – Brushed
- BM-EXH025P – Polished
- BM-EXH025TB – Thermal Coated Black Finish
Installation and Fitting
Direct bolt-on fitment with the supplied hardware. Retains the OEM slip-on connection and mates to the factory or aftermarket exhaust system. For professional fitting, book with Nforcd in Warwickshire – request a quote at Sales@nforcd.com.
Manufacturer and Warranty
Manufactured by Evolution Racewerks ER with a Limited Lifetime Warranty non-transferable.
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Note: Catless downpipes are intended for off-road and track use where applicable. Check local regulations before installation.