Milltek Secondary Catalyst Bypass – BMW M3 / M4 (G80/G82) S58 (Non-OPF) – Non-Resonated → OE Axle-Back
Non-Resonated → OE Axle-Back
$1,155.60
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Milltek
Milltek Secondary Catalyst Bypass – BMW M3 / M4 (G80/G82) S58 (Non-OPF) – Non-Resonated → OE Axle-Back
$1,155.60
OVERVIEW
Milltek's secondary catalyst bypass mid-sections open up the S58 M3 and M4 (US non-OPF cars) for more flow and a louder note. Configured as Non-Resonated → OE Axle-Back. Off-road/competition use.
SPECS
- T304 aircraft-grade stainless steel construction
- Mandrel-bent, TIG-welded; hand-finished tips
- Secondary-cat bypass mid-section
- Resonated or non-resonated
- Mates to the OE or a Milltek axle-back (select correct version)
PARTS INCLUDED
- Milltek secondary-cat bypass mid-section (per selected option)
- Fitting hardware
TECH RESOURCES
- Select the version matching your axle-back (OE vs Milltek)
- Off-road/competition use only — not emissions compliant
- Professional installation recommended
PART NUMBER
- Non-Resonated → OE Axle-Back — SSXBM1270
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Year |
|---|---|---|---|---|
| BMW | M3 / M3 Competition | G80 | S58 3.0L | 2021+ |
| BMW | M4 / M4 Competition | G82 / G83 | S58 3.0L | 2021+ |