MBRP Street 3in Quad Tip Cat Back Exhaust - 2015-2021 Subaru WRX / STI Subaru-STI-2018 Go Fast Bits Underdrive Pulley

Go Fast Bits Underdrive Pulley Kit wBelts Subaru Impreza RS 1999-2003 One of the ways that you can improve the response in your engine is by adding a lightweight pulley set

The powdercoated finish resists chipping and fading

The improvement under hard braking is real and measurable -- particularly noticeable at track days where braking zones are repeated consistently

A complete rear bushing refresh on a high-mileage AP1 or AP2 produces a significant improvement in rear end precision and feedback

MBRP Street 3in Quad Tip Cat Back Exhaust - 2015-2021 Subaru WRX / STI Subaru-STI-2018 Go Fast Bits Underdrive PulleyThe 3 Inch Cat Back Exhaust System will improve the sound and the performance of the Subaru WRX STI. RallySport Direct carries a great selection of quality performance exhaust systems and exhaust components brought to you by MBRP. Here, you are looking at the MBRP 3 Inch Cat Back Exhaust System. This exhaust system features smooth mandrel bends that limit back pressure and turbulence. When combined with a larger piping diameter, you get an increase in