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and the high-flow filter improves airflow in the factory airbox — the two highest-return modifications available on the Civic Si while retaining all factory hardware
Polyurethane kit for rear upper control arm inner bushing position
Boomba designed this bypass valve to be a direct replacement for your OEM bypass valve that can become weak and leaky especially if you perform other upgrades that increase boost and more power
Triple disc capability on the 4G63T Evo 8/9 represents the maximum mechanical clutch solution available for this platform
Extreme Turbo Systems is proud to release our new Subaru STI V2 MaxFlow Front Facing Exhaust Header for the 2004+ Subaru STI
Overtake Turbo to Downpipe Gasket - Subaru w/ EJ Engine (Inc. 2002-2014 Subaru WRX / 2004-2021 Subaru STI) PDM_radiator-shrouds and the high-flow filter improvesOvertake Turbo to Downpipe Gasket Be Done With Leaks Looking for a Subaru gasket that won't leak? We get it finding a high quality gasket for your Subaru exhaust system can be challenging. Most aftermarket Subaru gaskets fail to deliver, leaving you with frustration. Why? Many gaskets aren't made entirely from stainless steel, leading to premature wear and failure. We know most of us have experienced the dreaded waffle gasket blow out! No good. That's