Stroke: 91 Displacement: 2954ccmWossner Comp. Ratio: 8.0:1 OE Comp. Ratio:8.4:1 Piston Weight(grams ): 320 ânote: price includes rings, wrist pins, clips and low friction skirt coatingââBore Sizes: 83.00 - Kit Part No. K9056DA, 83.50 - Kit Part No. K9056D050, 84.00- Kit Part No. K9056D100