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dual sideways mufflers
2011 is the year for going over 30 PSI of boost
O2 sensor bung: Default
connects directly to back of cat on EVO X and terminates with 3� V-Band flange which allows you to add one muffler with either single or dual exits
GReddy Subaru WRX/STI 2002-05 BOV Kit - Type FV Universal dual sideways mufflersGReddy Blow Off Valves are easily adjustable to eliminate compressor surge and preventing premature boost leakage, while increasing boost response between shifts. Each valve is made of durable cast and billet aluminum frame and the valve to diaphragm ratio provides performance that cheap piston types cannot offer. The spring stiffness adjustment screw and the three different models give the GReddy user the option to match vehicles with mild upgrades
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