BMW G80 M3 / G82 M4 / G83 – S58 Catless Downpipes

Unlock the full potential of your S58-powered BMW with the Blaze Performance catless downpipe set for the G80 M3, G82 M4 and G83 M4. Replacing the restrictive factory catalytic converters, these high-flow downpipes dramatically reduce exhaust backpressure — delivering faster turbo spool, increased horsepower and torque, and a far more aggressive exhaust note.

• High-grade stainless steel construction with precision TIG welds
• Catless design for maximum exhaust flow
• Integrated heat shielding to manage underbonnet temperatures
• Direct bolt-on fitment — no cutting or custom fabrication required
• Heavy-duty V-band clamp hardware included
• Suitable for high-output tuned builds

Designed for off-road / track use. Tuning recommended to maximise power gains.

Which BMW models are the S58 catless downpipes compatible with?
These catless downpipes fit the BMW G80 M3 (2021+), G82 M4 (2021+), G83 M4 Convertible, and G87 M2 (2023+) – all equipped with the S58 twin-turbo 3.0-litre inline-six engine.

Are these downpipes street legal?
These are catless (decat) downpipes designed for track and motorsport use. They remove the catalytic converters, which makes them non-compliant with road emission regulations in most jurisdictions. They are not for road use where emissions testing is required.

Will I need a remap after fitting these downpipes?
Yes, a supporting ECU remap is strongly recommended after fitting catless downpipes. The removal of back-pressure from the catalytic converters changes the exhaust gas dynamics, and a tune will ensure the S58 delivers maximum power and prevents lean-running fault codes.

How much power can I expect to gain?
On a supporting tune, catless S58 downpipes typically contribute 15–25 bhp to an overall Stage 2 package. Combined with supporting bolt-ons and a full remap, G80 M3 and G82 M4 customers regularly achieve 550–600+ bhp on pump fuel.