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6061 ALUMINUM CONSTRUCTION
These have a longer duration profile along with an added RPM potential
Engine: EJ20/EJ25
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 6061 ALUMINUM CONSTRUCTIONThe 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
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