Milltek Z-Pipe Secondary Catalyst Bypass - BMW G8X M3 M4 Non-OPF - Fits OE Axle-Back - SSXBM1424

Milltek Z-Pipe Secondary Catalyst Bypass for the BMW G80 M3 and G82 M4, Fits OE 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 OE 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: OE axle-back
• Fitting Time: 1.50 to 2.00 hours

Compatibility

• 2021 and later BMW G80 M3 and M3 Competition S58
• 2021 and later BMW G82 M4 and M4 Competition 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 > 3 Series > G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• BMW > 4 Series > G82 M4 & M4 Competition S58 3.0 Turbo > 2021 and Later

• 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.