CP Pistons Forged Pistons Subaru EJ257 WRX STI 3.937 (100.0mm) Bore / +0.020(+0.5mm) Size / 8.21 Compression Ratio


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When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission.
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.