Milltek Secondary Catalyst Bypass | BMW G8X M3 M4

Name: Milltek Secondary Catalyst Bypass | BMW G8X M3 M4
Brand: Milltek
SKU: SSXBM1342
Price: 1228.36 USD
Availability: InStock

SKU: SSXBM1342

$1228.36 $1228.36

System Type

Milltek Axle Back Secondary Catalyst Bypass for BMW G8X M3 and M4 (S58). Mandrel-bent T304L stainless, non-resonated mid-pipe with X-pipe. Direct fitment to OE or Milltek axle back. TUV tested turbo efficiency upgrade.

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More info

Z-Pipe upgrade for existing Milltek BMW G80 M3 and G82 M4 secondary catalyst bypass customers. 3D printed 316L stainless. Replaces a Milltek X-Pipe, resonator or twin straight pipes in a 102mm mid-pipe or secondary cat bypass system. Cannot be used on its own. Engineered for the Emotion. - Read More

Parts

Description

Milltek Axle Back Secondary Catalyst Bypass system for BMW G8X M3 and M4. Direct fitment 102mm single mid-pipe with X-pipe configuration. Non-resonated design for closed-course and track use. Connects to either OE axle back (SSXBM1342) or Milltek Cat-Back Axle Back (SSXBM1341).

Mandrel-bent T304L stainless steel construction with hand-finished welds. Removes secondary catalyst restrictions post-turbocharger for improved turbo efficiency and mid-range response. Engineered to work seamlessly with both OEM and Milltek exhaust systems. Uses OE mounting points and hangers—no modification required.

Fits BMW G8X M3 (S58 engine) with OE or Milltek axle-back systems
Fits BMW G8X M4 (S58 engine) with OE or Milltek axle-back systems
Non-resonated: optimized for track and closed-course driving
102mm bore mandrel-bent X-pipe design
T304L stainless, TUV tested for durability

Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Key Facts

Pipe Diameter	101.60
1.5 to 2 hours to fit (including removing OE system)
Race Product	Yes
EMarked	No

System Fitment List

- 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