Pontiac V8 Dome Piston Set 4.150 Bore +10cc

The KB Performance Pontiac V8 Dome Piston Set 4.150 Bore +10cc is a hypereutectic forged piston assembly engineered for high-performance Pontiac V8 engine builds. This eight-piece set delivers increased compression and displacement gains through its +10cc dome design, making it ideal for naturally aspirated street performance, bracket racing, and classic muscle car restoration projects where compression ratio optimization is critical.

The 4.150-inch bore specification matches oversized block platforms and aggressive stroker combinations common in modern Pontiac performance applications. Hypereutectic construction provides superior thermal stability and reduced expansion over cast aluminum, extending piston life under sustained high-RPM operation. The ring groove configuration—5/64 x 5/64 x 3/16 inch—accommodates standard Pontiac ring packages and ensures reliable sealing across engine speeds. The dome geometry adds combustion chamber volume reduction, raising static compression ratio when paired with appropriate block and head combinations—a decisive factor in naturally aspirated power output.

This KB Performance piston set targets engine builders and enthusiasts restoring or upgrading Pontiac V8 powerplants, particularly those pursuing competitive compression numbers without forced induction. Builders working with 4.150-inch bore blocks—common in 461 and 500+ cubic-inch displacement engines—will find this set compatible with standard connecting rod lengths and factory-style wrist pin specifications. The +10cc dome is particularly suited to 9.5:1 to 11:1 compression builds when paired with appropriate head gasket thickness and combustion chamber volumes.

KB Performance has long held a presence in the hypereutectic forged piston market, serving both OEM replacement and performance-upgrade channels. This piston set represents the middle ground between cost-conscious restoration and premium billet forging, offering the durability and thermal properties required for street-driven and weekend-warrior performance engines without the premium investment of fully custom forgings.