Pontiac 428 Piston Set 4.150 Bore -10cc

The ICON Pistons Pontiac 428 Piston Set 4.150 Bore -10cc delivers premium forged construction engineered for high-performance V8 applications. This eight-piston set is purpose-built for Pontiac V8 engines requiring a 4.150-inch bore diameter with a -10cc (minus-10 cubic centimeter) compression ratio specification. Constructed from aerospace-grade aluminum, these pistons are designed to handle sustained high RPM operation and elevated boost pressures typical of street performance and racing builds.

The -10cc dome configuration reduces combustion chamber volume, raising static compression ratio for improved fuel efficiency and power output on naturally aspirated or moderately boosted engines. Ring groove dimensions of 1/16 x 1/16 x 3/16 inches conform to standard piston ring specifications, ensuring reliable sealing and controlled ring motion throughout the engine's operating range. Premium forging processes eliminate the voids and weak points inherent in cast pistons, resulting in superior strength-to-weight ratio and fatigue resistance—critical factors in turbocharged or supercharged applications where detonation risk and thermal stress are elevated.

This piston set is specified for Pontiac V8 engine builders targeting 400+ horsepower naturally aspirated builds or boost-compatible performance platforms. Buyers upgrading cylinder head flow, intake manifolds, or camshaft profiles benefit from the compression bump this dome geometry provides. The set weighs 13.95 pounds total, enabling quick inventory verification and installation planning. ICON Pistons maintains a reputation for precision manufacturing and OEM-quality fitment, making this set suitable for street applications requiring reliability as well as organized competition environments where component traceability matters.