CP Piston Diesel Set Chevy / GMC Duramax 6.6L - Bore (4.075in) - (+.02) - CR (15.1) - CH (1.946)

This set includes a complete set of CP Pistons diesel pistons for your Chevy or GMC Duramax 6.6L engine. These pistons are built to handle the demands of diesel power, featuring a 4.075-inch bore and a compression ratio of 15.1:1. The compression height is 1.946 inches, which is a critical measurement for proper engine timing and valve clearance. CP Pistons are well-known for their robust construction, and this diesel set is no exception. They are designed to be a solid option for rebuilding or upgrading your Duramax engine. The specific bore size means these are intended for engines that have been machined to this dimension, often as part of an overhaul or performance build. Ensure your engine block has been prepared to this exact bore size before installation. Please note that these pistons are not CARB approved and cannot be shipped to California. Always refer to your engine builder's specifications and the manufacturer's installation instructions for proper fitment and assembly procedures.