MAD BMW S58 3.5" Fat Boy Downpipes M2 M3 M4 G87 G80 G82 G83 g2x designed to perfectly match the

designed to perfectly match the factory specs of your M4

thanks to integrated hook-and-loop fasteners that ensure a secure fit in seconds—no tools required

Lifetime WarrantyA wheel you can depend on

qty1 oddments tray (if ordered)

MAD BMW S58 3.5" Fat Boy Downpipes M2 M3 M4 G87 G80 G82 G83 g2x designed to perfectly match theThe MAD 3. 5" S58 Fat boy is the largest BMW S58 catless downpipe on the market! Upgrade from the stock S58 downpipes to the MAD 3. 5" Fat Boy S58 catless downpipes for maximum airflow, power, and sound! Upgrade to the MAD BMW 3. 5" Fat Boy S58 downpipes to eliminate the backpressure caused by your stock catalytic converters. By upgrading to our downpipes, your turbos can now spool faster and achieve maximum power. As a bonus, your car will sound a