Pontiac 428 Piston Set 4.150 Bore -10cc

The ICON Pistons Pontiac 428 Piston Set 4.150 Bore -10cc is engineered for serious engine builders and performance enthusiasts tackling high-output big-block builds. This forged piston set delivers the precision geometry and material science required when upgrading or rebuilding a Pontiac 428 engine for street, strip, or competition use.

The -10cc chamber volume is critical for achieving proper compression ratios in modern fuel blends while maintaining detonation resistance in aggressive tune scenarios. ICON Pistons are forged from premium aluminum alloy with enhanced strength and thermal properties that handle elevated combustion pressures and sustained rpm. The 4.150-inch bore specification matches the exact cylinder diameter of your engine block, eliminating guesswork and ensuring proper ring seating and blowby control.

This piston set is ideal for owners rebuilding original 428 blocks or machine shops assembling complete crate engines for classic Pontiac muscle cars and hot rods. Proper installation requires coordinated work with a precision machine shop to confirm deck height, rod length compatibility, and ring gap clearances before final assembly.