Forged Piston Kit - Mahle Motorsport PowerPak+ - 10.5-1 Compression Ratio - GT86 & BRZ FA20Forged Piston Kit Mahle Motorsport PowerPak+ 10. 5: 1 Compression Ratio GT86 & BRZ FA20 2618 Alloy 10. 5: 1 Compression Ratio on the 86mm 10. 6: 1 Compression Ratio on 86. 5mm CR calculated at 0. 2mm below deck and 0. 61 x 89. 5mm head gasket Listing is for a set of 4 pistons, gudgeon pins and clips MAHLE Motorsport Subaru Forged PowerPak and PowerPak+ piston kits offer superior reliability and performance, letting you take performance to the next
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