OVERVIEW
Evolution Racewerks Competition Series 4-inch catless downpipe for US-spec BMW X1 (F48), X2 (F39) and 2 Series Gran Coupe (F44) with the B46/B48 four-cylinder. The factory downpipe is the single biggest exhaust restriction on these cars, and the ER replacement significantly improves spool and mid-range torque on tuned applications.
SPECS
- T304 stainless steel construction, 4" body
- Competition Series: catless design for maximum flow
- Brush finish (S)
- FWD and AWD (xDrive) versions
PARTS INCLUDED
- ER Competition Series catless downpipe, Brush finish
- Required gaskets and hardware
TECH RESOURCES
Additional Parts Required
- Supporting tuning is REQUIRED after installation to prevent check engine lights and realize the performance gain (sold separately).
Installation
- Installation guidance available through Evolution Racewerks technical support.
Notes
- Competition Series catless downpipes are for OFF-ROAD / RACE USE ONLY and are not emissions legal for street use.
- Select FWD or AWD (xDrive) to match your vehicle.
- Confirm region spec and OPF presence before ordering — US and EU/Asia versions are not interchangeable.
PART NUMBER
- BM-EXH021S — Competition Series 4" catless downpipe, FWD, Brush finish
- BM-EXH021SX — Competition Series 4" catless downpipe, AWD (xDrive), Brush finish
- EU/Asia Spec B48 version — BM-EXH024S
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | X1 sDrive28i / X1 xDrive28i | F48 | B46 / B48 (US Spec) | 2016+ |
| BMW | X2 sDrive28i / X2 xDrive28i | F39 | B46 / B48 (US Spec) | 2016+ |
| BMW | 228i Gran Coupe / 228i xDrive Gran Coupe | F44 | B46 / B48 (US Spec) | 2020+ |