COBB Tuning Cat Back Exhaust Stainless Steel - 2002-2007 Subaru WRX/STI PDM_oil-control-devices but you have to make

but you have to make sure that you use the same nut that either came with the shaft of the strut or use a nut with the same thread pitch

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COBB Tuning Cat Back Exhaust Stainless Steel - 2002-2007 Subaru WRX/STI PDM_oil-control-devices but you have to makeThe Cobb Stainless Catback: The Sound Your GD WRX STI Deserves The Cobb 3 inch Stainless Steel Cat Back Exhaust for the 2002 2007 Subaru WRX STI is a mandrel bent stainless steel system designed to free up the exhaust restriction downstream of the catalytic converter and give the GD WRX STI the exhaust note it should have come with. The 3 inch piping supports Stage 2 and Stage 3 power levels without becoming the restriction in the exhaust system. 3