Milltek Non-Resonated Secondary Catalyst Bypass Mid-Pipe with X-Pipe for BMW G87 M2. Direct fitment to OEM axle back (SSXBM1331) or Milltek Axle Back (SSXBM1332). Features 4.00" primary and 102mm secondary pipe diameter mandrel-bent T304L stainless steel construction.

Hand-finished T304L stainless steel throughout. Non-resonated design engineered for full-throttle character without mid-range drone. OEM+ fitment uses factory hangers and mounting points—no modification required. Dyno-proven flow improvement over secondary cat restrictors.

System Fitment:

• BMW G87 M2 (S58 engine)
• Replaces factory secondary catalytic converter section
• Connects to OE axle back or Milltek Axle Back exhaust
• Track and street legal where local regulations permit

Engineered in-house and tested at Nürburgring. Milltek's 40+ year heritage in performance exhaust manufacturing means precision mandrel bending, CNC-formed joints, and real dyno validation—not universal-fit compromises.