BMW S58 Decat Downpipes | M2 / M3 / M4 (G80 G81 G82 G83 G87) – T304 Stainless | Midnight Performance

Midnight Performance™ BMW S58 Twin-Turbo Decat Downpipes – M2 / M3 / M4 (G8X)

The single biggest bolt-on upgrade for your S58. Our matched pair of T304 stainless decat downpipes eliminate the factory primary catalytic converters — slashing backpressure, sharpening turbo spool, and transforming the exhaust note of the most powerful BMW M inline-six ever built. Engineered to bolt directly onto your G8X with zero modification required.

Why Choose Midnight Performance?

• Hand-purged, back-purged TIG welding — withstands extreme S58 thermal cycles without cracking
• CNC-machined billet flanges — guaranteed leak-free seal at the turbo housing
• Precision 3D-scanned geometry — exact fit for both RWD and xDrive platforms, LHD and RHD
• Integrated O2 sensor bungs — drop-in fit with OEM or aftermarket sensors, no relocation needed
• Aggressive straight-six character — crisp mechanical roar on upshifts, pronounced burbles on overrun

Technical Specifications

Verified Fitment

• BMW M3 Saloon (G80): 2021–2026
• BMW M3 Touring (G81): 2023–2026
• BMW M4 Coupé (G82): 2021–2026
• BMW M4 Convertible (G83): 2021–2026
• BMW M2 Coupé (G87): 2023–2026

What's in the Box

• 1× Matched Pair (Set of 2) S58 T304 Stainless Decat Downpipes
• OEM-Style Hanger Brackets & Flanges

⚠️ Off-road and track use only. This decat configuration deletes the primary catalytic converter and will not pass a standard UK MOT emissions test. Not for use on public roads.

Professional Fitting Available in Birmingham

Our workshop team can fit this for you. Contact us with your vehicle details to book a slot.