BMW 3 / 4 Series F80 M3 / F82 M4 3.0L 3" Exhaust Decat Downpipes

Direnza decat pipes are manufactured from T304 grade brushed steel for those intense track-sessions. A direct replacement for the stock part, Direnza mandrel-bent exhaust components are fully TIG welded and feature CNC-machined flanges for strength and an accurate, secure fit every time. Engineered to not only improve power and torque across the entire RPM range but increase volume and allow for additional power in the future should you ever want it. 2 x 3" Diameter downpipes for maximum gas flow giving optimum performance increases Replaces the restrictive catalytic converter allowing you to gain more power from the S55 I-6 engine Tig welded from T304 stainless steel for maximum strength and rust prevention Designed to be a direct replacement for the OEM catalytic converter Built in Flexi's reducing any strain on the exhaust system May require bypass software on vehicle ECU.