Stroke: 80 Displacement: 1588 ccm Wossner Comp. Ratio: 11.6:1 OE Comp. Ratio: 9.5:1 Piston Weight(grams ): 316 ânote: price includes rings, wrist pins, clips and low friction skirt coatingââBore Sizes: 79.50- Kit Part No. K9180DA, 80.00 - Kit Part No. K9180D050, 80.50 - Kit Part No. K9180D100, 81.00 - Kit Part No. K9180D150