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The improvement under hard braking is real and measurable -- particularly noticeable at track days where braking zones are repeated consistently
as well as fully forged stroker rods and CP pistons
Available in 8oz bottles
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 The improvement under hard brakingThe 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