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Ships within 48 hours · Estimated delivery Sep 24 - Sep 29
providing a superior seal
spark plugs
thus are emissions and track legal
PDF Instructions for 15-21 STI
*Please note that vehicles that have experienced a bearing failure will need to purchase replacement Oil Cooler (Sold Separately) to complete their installation
RADIUM Air Oil Separator (AOS-R) Kit, 15-21 WRX, 14-18 Forester XT RADIUM:Part # rad20-0258-00 providing a superior sealClick here to download installation instructions (PDF) COMPATIBILITY15 21 Subaru WRX (LHD)14 18 Subaru Forester XT (LHD) OVERVIEWHigh powered modified Subaru engines tend to generate excessive blow by oil and gasses. In these cases, an ordinary small catch can may quickly fill with oil and not be adequate. Like the Radium Engineering Subaru Dual Catch Can Kit, the AOS R (Air Oil Separator Return) kit is responsible for keeping blow by oil and other
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