Evolution Racewerks ER BMW Mini B46 Competition Series 4" Catted Downpipe
Looking for a BMW B46 downpipe or Mini Cooper S B46 downpipe that delivers real gains, quicker spool, and OEM-level fitment? The Evolution Racewerks Competition Series 4 inch Catted Downpipe is the upgrade enthusiasts search for when they want performance, quality and reliability on BMW X1 F48, BMW X2 F39 and MINI Cooper S platforms. Built from 100 percent 304 stainless steel with precision TIG welds and a CNC machined turbocharger V-band flange, this 4 inch high flow catted downpipe transforms responsiveness and mid-range punch while keeping compatibility with factory and aftermarket exhaust systems.
At Nforcd we have installed and used ER hardware on customer cars and the feedback has been excellent. Sharper throttle response, faster turbo spool and a broader torque curve are exactly what drivers want from a performance catted downpipe for BMW B46 and MINI B46 applications. If you are searching for BMW X1 downpipe, BMW X2 downpipe, MINI Cooper S downpipe, Mini F56 downpipe, Mini F55 downpipe, Mini Clubman downpipe, Mini Countryman downpipe or 4 inch catted downpipe UK, this is the proven solution.
Why choose this ER 4" catted downpipe
- Designed for the BMW B46 2.0 turbo engine found in 2016+ BMW X1 F48, 2016+ BMW X2 F39 and 2016+ MINI Cooper S, Clubman, Cabrio and Countryman.
- Big power potential with a higher, broader power and torque curve. Evolution Racewerks reports average gains of 14 to 16 whp and 20 to 24 wtq depending on vehicle modifications.
- 4 inch mandrel bent stainless steel with a smooth transition to the exhaust for reduced back pressure.
- Faster turbo spool and improved throttle response for stronger real-world acceleration.
- 100 percent 304 stainless steel construction and 100 percent TIG welded for strength and longevity.
- Precision CNC machined 4 inch turbocharger V-band flange for perfect seal and alignment.
- Stainless steel flex section, just like factory, to allow correct movement and reduce stress.
- Retains all factory heat shields for a clean, OEM-like install.
- Compatible with factory or aftermarket cat-back exhaust systems.
- Mirror polish or brushed finish available, plus optional high temperature black thermal ceramic coating to reduce under-bonnet heat.
- Optional additional O2 sensor bung for wideband and optional EGT bung, both supplied pre-plugged.
- Track-tested durability and a Limited Lifetime Warranty from Evolution Racewerks.
- Includes all required hardware for a complete installation.
xDrive AWD friendly option
On xDrive all wheel drive models the front driveshaft runs directly under the downpipe, which makes removal difficult on a single-piece design. The ER two-piece xDrive version allows removal and installation without dropping the subframe or disconnecting the driveshaft. This saves significant time and makes future servicing easier.
Construction details
- 4 inch inlet at the turbo and true 4 inch piping to avoid restrictive steps at the turbine outlet, then reduced further downstream to minimise turbulence and back pressure.
- CNC machined O2 sensor bosses and laser-cut brackets in stainless steel for precise fitment.
- Optional high-temp ceramic thermal coating rated up to 2000°F to keep heat energy in the exhaust stream and reduce engine bay temperatures.
Fitment and compatibility
- BMW X1 F48 B46 2.0 turbo 2016 onwards
- BMW X2 F39 B46 2.0 turbo 2016 onwards
- MINI Cooper S B46 2016 onwards including:
- MINI F55 Cooper S 5-door
- MINI F56 Cooper S 3-door
- MINI F54 Clubman Cooper S
- MINI F57 Cabrio Cooper S
- MINI F60 Countryman Cooper S
Important engine note: This downpipe is for the B46 engine. The B46 used in US spec cars is different to the B48 found in many EU and Asia spec cars and downpipes are not interchangeable. Please confirm your engine code before ordering.
Options
- Ceramic Thermal Coating black finish to reduce under-bonnet temperatures and add corrosion resistance while maintaining exhaust gas velocity.
- Additional O2 sensor bung for wideband use, supplied with pre-installed plug.
- Optional EGT bung 1/8" NPT, supplied with pre-installed plug.
What you get
- Evolution Racewerks Competition Series 4 inch catted downpipe assembly
- All necessary installation hardware
- Installation instructions and support from Nforcd
Installation and support
Professional fitting recommended. For expert installation, dyno and aftercare support, choose Nforcd in Warwickshire. Request a fitted price quote at Sales@nforcd.com.
Search-friendly terms
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Legal and usage
Off road and motorsport use only. Not legal for use on pollution-controlled vehicles on public roads or highways.
Part number
BM-EXH021