Product details:

Speed Pro L-2300NF: Pistons, Forged, Dome, 4.250 in. After that, they're machined to their final configuration. These pistons offer excellent strength and durability and are capable of taking the punishment that's dished out on the street and in competition. They're available for a wide variety of applications, including OE replacements and all-out racing engines. Speed Pro. L-2300NF fits these applications: CHEVROLET 7.0L/427 Chevy big block Mark IV.