Manley Chevrolet Small Block 4.060in Bore 1.280in CH -4.00 CC Piston Set

Manley's Platinum Series pistons provide trouble-free installation, excellent reliability, and are unsurpassed in producing maximum horsepower. Made from 2618 high strength material, they feature a lightweight design and a slightly thicker deck for higher horsepower applications. They have symmetrical dome profiles (no left/rights required), perfect ring groove to skirt squareness, and pressure balance grooves. A 2.300" length Premium Chrome Moly .150" wall 110 gram pin is included (integral to the piston design), along with round wire locks. These pistons feature 1.5 1.5 3.0mm ring grooves and result in a 13.2:1 compression ratio with 64cc heads.