
Milltek Z-Pipe Secondary Catalyst Bypass - BMW G87 M2 Non-OPF - Fits Milltek Axle-Back - SSXBM1429
Ships free in the US
Make sure this fits your car
Fits: M2 G87
- Shop tested in Dallas
- Free pickup in Dallas
- Installs at our shop
Milltek Z-Pipe Secondary Catalyst Bypass for the BMW G87 M2, Fits Milltek Axle-Back
A secondary catalyst bypass mid-pipe for the S58, built around the Milltek Z-Pipe in place of an X-Pipe, twin straight pipes or resonated section. The Z-Pipe is a 3D printed 316L stainless crossover that merges the exhaust pulses from the S58's two cylinder banks. The result is a more exotic note with less rasp and reduced back pressure. Under load the sound is cleaner and higher pitched, closest in character to the Nissan GT-R (R35). On deceleration the deep rumble and burble are more pronounced. Advanced 3D printing keeps the weight increase over a traditional X-Pipe minimal.
Key Features
- Secondary Catalyst Bypass: single 102mm (4in) mid-pipe replacing the factory secondary catalyst section.
- Z-Pipe Crossover: 3D printed 316L stainless, merges the bank pulses for a cleaner, higher pitched note.
- Fits the Milltek Axle-Back: supplied with the correct adapters and chassis brace.
- Downpipes: fits OE downpipes or Milltek SSXBM1333 / SSXBM1334.
- For closed-course and competition use only.
Technical Specifications
- Pipe Diameter: 4.00in (101.60mm)
- Material: T304L stainless mid-pipe, 316L stainless 3D printed Z-Pipe
- Fits: Milltek axle-back
- Fitting Time: 1.50 to 2.00 hours
Compatibility
- 2023 and later BMW G87 M2 S58
Why Choose Milltek?
Engineered for the Emotion.
Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Nurburgring tested.
Specifications
- Pipe diameter: 101.6mm (4.00")
- Fitting time: 1.5 to 2 hours, including removing the factory system
- Off-road / competition use only. Not legal for use on public roads in the US.
Fitment
- BMW > 2 Series > M2 Coupe (G87 S58) > 2023 and Later
Listed for these cars. Check the title and description for exact years, body styles and drivetrain.
| Make | Model | Chassis | Years | Fits |
|---|---|---|---|---|
| BMW | M2 | G87 | 2023+ |
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.
More for your build

Milltek Z-Pipe Secondary Catalyst Bypass - BMW G87 M2 Non-OPF - Fits OE Axle-Back - SSXBM1428

Milltek Z-Pipe Upgrade for Secondary Catalyst Bypass - BMW G87 M2 - SSXBM1431

Milltek Optional X-Pipe Centre Section - BMW M2 2023+ (G87) - SSXBM1326
