Perrin Recirculating BOV for 02-14WRX/04+STi Size:Black we have sized the cap Engine Mount
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Perrin Recirculating BOV for 02 14WRX 04+STi Size:Black we have sized the cap Engine Mount we have sized the cap nut to be the same size as a lug nut • Fits STM Front Drag Brake Kits 2004 2021 Subaru STi Simply disconnect the recirculatory hose and let your blow off valve vent to atmosphere on cars using speed density type ECU's (Cars with no MAF)