Milltek Secondary Catalyst Bypass - BMW M3/M4 2021+ (G80/G82) - SSXBM1341
Ships free in the US
Make sure this fits your car
Fits: M3 G80/G81, M4 G82/G83
- Shop tested in Dallas
- Free pickup in Dallas
- Installs at our shop
Milltek Axle Back Secondary Catalyst Bypass for the BMW G8X M3 and M4 (S58). Mandrel-bent T304L stainless steel construction with a non-resonated 102mm single mid-pipe and X-pipe configuration, engineered to remove secondary catalyst restrictions post-turbocharger for improved turbo efficiency and mid-range response. Direct bolt-on to either the OE axle-back or the Milltek axle-back with no modification required.
Key Features:
Mandrel-bent T304L stainless steel with hand-finished welds
102mm bore non-resonated X-pipe design, optimized for track and closed-course use
Uses OE mounting points and hangers - no modification needed
TUV tested for durability
Fits: 2021+ BMW M3 & M4 Competition (G80/G82, S58 engine)
Listed for these cars. Check the title and description for exact years, body styles and drivetrain.
| Make | Model | Chassis | Years | Fits |
|---|---|---|---|---|
| BMW | M3 | G80/G81 | 2021+ | |
| BMW | M4 | G82/G83 | 2021+ |
Not sure? Call or text 945-954-1142 with your car or VIN.
- Free US shipping on orders over $250.
- Free pickup at our Dallas shop, usually ready within 24 hours.
- Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
- Want it installed? Book the install at thegbmotors.com.
Full details are on our shipping and returns page.
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