BMW G80 M3 G82 M4 S58 MaxFlow Race Downpipes, 3 or 3.5 Inch

The IRL MaxFlow Race Downpipes for S58-powered BMWs remove the restrictive factory catalytic converters and use a true mandrel-bent design in your choice of 3 inch or 3.5 inch.

Why you need it

The MaxFlow design minimizes backpressure while keeping exhaust velocity smooth, so the turbos work more efficiently. You get better throttle response, reduced turbo effort and an aggressive motorsport-inspired note.

Fits

• BMW G80 M3
• BMW G81 M3 Touring
• BMW G82 M4 Coupe
• BMW G83 M4 Convertible
• All S58-powered models (2021+)

Features

• 3 inch or 3.5 inch MaxFlow mandrel-bent design
• Premium T304 stainless steel, precision TIG welded
• Faster turbo spool and improved throttle response
• Direct bolt-on at factory mounting locations
• Works with the OEM exhaust and aftermarket cat-back systems

Good to know

For off-road and closed-course competition vehicles only. These remove the factory catalytic converters. A check engine light is expected on factory calibrations and ECU tuning is recommended.