Milltek Secondary Catalyst Bypass | BMW G8X M3 M4

Description

Non-resonated 102mm mid-pipe secondary catalyst bypass for BMW G8X M3 and M4. Direct OEM+ fitment to Milltek axle-back systems (SSXBM1340) or factory exhaust. Hand-finished T304L stainless steel construction with mandrel-bent piping. Single mid-pipe configuration engineered for turbo-back flexibility. CNC-formed flanges, uses original hangers for installation without modification. Track-focused non-resonated design eliminates secondary cat restrictions for maximum turbo response and mid-range performance. • Fitment: BMW M3 G80 / M4 G82 G83 • Configuration: Non-Resonated Secondary Cat Bypass • Bore: 102mm mandrel-bent • Material: T304L stainless steel, hand-finished • Pairs with: Milltek SSXBM1340 axle-back or OE cat-back systems • Installation: OEM hangers, no modification required Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 14 vehicles including:

• 2021 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• 2022 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• 2023 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• 2024 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• 2025 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• 2026 BMW M3— G80 M3 & M3 Competition S58 3.0 Turbo > 2021 and Later
• + 8 more vehicles