The MAD S55 Fat Boy 3.5" Downpipes are the largest BMW S55 M2/M3/M4 downpipes on the market. Upgrade to catless 3.5" downpipes for maximum airflow, power, and sound by eliminating the backpressure from your stock catalytic converters.
This Part Fits:
| Years |
Make |
Model |
Chassis |
| 2016-2021 |
BMW |
M2 / M2 Competition |
F87 |
| 2015-2020 |
BMW |
M3/M4 |
F80/F82/F83 |
