Sealed Power Performance Piston Rings - 4.070 in Bore - Drop In - 5/64 x 5/64 x 3/16 in Thick - Standard Tension - Moly - 8-Cylinder 21411 Drilling of the block is

Drilling of the block is required for installation

Available for small block Chevy and Ford and big block Chevy applications

Weathertight connectors securely lock together to provide reliable connections that are unaffected by water

It provides your engine with the largest amount of high-flowing air and delivers the highest power gains in most cases

Includes Mounting For Stock A/C Vents

Sealed Power Performance Piston Rings - 4.070 in Bore - Drop In - 5/64 x 5/64 x 3/16 in Thick - Standard Tension - Moly - 8-Cylinder 21411 Drilling of the block isProduct Description: Piston Rings Performance 4. 070 in Bore Drop In 5 64 x 5 64 x 3 16 in Thick Standard Tension Steel Moly 8 Cylinder Sealed Power engine products are application engineered components, including pistons, piston rings, engine bearings, oil pumps and lifters. These proven replacement parts are the result of product development efforts, dedicated to putting only the absolute best on the street. Our engineers design and validate the