Stroke: 79 Displacement: 2455ccmWossner Comp. Ratio: 8.0:1 OE Comp. Ratio: 8.2:1 Piston Weight(grams ): 403 note: price includes rings, wrist pins, clips and low friction skirt coatingââBore Sizes: 100.00- Kit Part No. K9131D050, 100.50- Kit Part No. K9131D100, 99.50 - Kit Part No. K9131DA