SPEED PRO PISTONS This item is for eight (8) .030 over bore Speed Pro/Sealed Power hypereutectic, coated skirt flat top pistons and a moly piston ring set (Hastings/MAHLE) for Ford 289ci and 302ci small block V-8 engines. P/N (8) H273CP-030 + 2M139-030. These pistons can be used as a performance upgrade in engines originally equipped with dish top pistons. PISTON SPECIFICATIONS Bore 4.030 in. (at .030 bore)Stroke: 2.870 in. for 289ci; 3.000 in for 302 (stock)Connecting Rod Length: 5.155 in for 289ci, 5.090 in. for 302ci; rods NOT includedPiston Top Style: Flat top with 4-valve reliefsPiston Head Volume: +8.0ccCompression Distance: 1.605 in.Wrist Pin Diameter: .912 in.; pins includedWrist Pin Style: Press-fit or floating; pin clips includedRing Land Size: 5/64-5/64-3/16 (oil ring); rings includedUsage: Street and mild strip; up to 75HP of nitrousRPM Range: Idle - 6,000Compression Ratio (approximate): 9.2:1 w/58cc; 8.9:1 w/60cc; 8.1:1 w/68cc We offer some of the quickest delivery times to most of the US on eBay. We have locations in Alabama, Louisiana, and Tennessee. These locations allow us to offer our customers quick, efficient service and delivery times. The free shipping option is available for orders shipped within the lower 48 US-states. Falcon Performance specializes in shipments to Sweden, Germany, Australia, Norway, Denmark, France, United Kingdom, Iceland, South Africa, New Zealand, Japan, Canada, and many other countries. Please use the shipping calculator for orders outside the continental USA. We do combine shipping costs for purchasing multiple items. Before paying, add all desired items to your eBay cart and then pay for all at one time. The eBay system will calculate the combined shipping discount. Please note that "free shipping" is not free for us but only to you. We pay to ship all parts to customers. Should you decide to return your purchase due to 'buyers remorse', we will refund the parts price less a restocking fee for the return; to mostly recoup our original shipping costs. Any damage to box or parts will alter the amount of the restocking fee. In many cases, we must buy new boxes from our suppliers. Put our 75+ combined years of experience to work for you... Thank you, the Falcon Team!