AIRTEC Motorsport Downpipe Sports Cat for BMW G Series – M2, M3 & M4 sti 108% increase in overall capacity

108% increase in overall capacity in comparison to original

These billet aluminum parts will not pack and wear over time

Spark plug technology

For Mercedes Benz E-CLASS (W210)

AIRTEC Motorsport Downpipe Sports Cat for BMW G Series – M2, M3 & M4 sti 108% increase in overall capacityBy replacing the restrictive primary catalytic converters located in the original downpipes with specially designed high flow sports cats, back pressure is reduced, which effectively improves the engines breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust note. Complete with replacement fitting kit, the downpipes will mate to a standard or aftermarket