BMW G80 M3 G82 M4 G87 M2 S58 3 Inch MaxFlow 400-Cell Downpipes

The IRL MaxFlow 400 Cell High-Flow Downpipes help you maximize your S58 while keeping a refined exhaust tone, using premium 400-cell high-flow metallic catalytic converters.

Why you need it

They flow far better than the factory units, reducing backpressure for quicker spool, sharper throttle response and noticeable gains in horsepower and torque. You get a deeper, more refined note without the harshness of lower-cell-count cats.

Fits

• BMW G87 M2 (S58)
• BMW G80 M3
• BMW G81 M3 Touring
• BMW G82 M4 Coupe
• BMW G83 M4 Convertible

Features

• 3 inch MaxFlow high-flow design
• Premium 400-cell high-flow metallic catalytic converters
• T304 stainless steel, precision TIG welded
• Direct bolt-on at OEM mounting locations
• Works with the factory exhaust and most aftermarket cat-backs

Good to know

These 400-cell downpipes are not EPA certified and are intended for off-road and motorsport use only where permitted by law. The 400-cell design greatly reduces the chance of a check engine light versus lower-cell cats, but IRL does not offer a no-CEL guarantee. ECU tuning may be recommended.