Pontiac V8 Dished Piston Set 4.160 Bore -14cc

The Pontiac V8 Dished Piston Set 4.160 Bore -14cc from ICON Pistons is engineered for enthusiasts and professionals building high-performance Pontiac V8 engines. Dished pistons are essential for engine builders targeting specific compression ratios, particularly in forced-induction or nitrous applications where controlling combustion chamber volume is critical. This piston set delivers the precision geometry needed for reliable power production and detonation control in street, bracket racing, and track-focused builds.

The -14cc dished design creates a concave crown that reduces combustion chamber volume, allowing engine builders to increase compression ratio without enlarging bore diameter or milling the block. A 4.160-inch bore specification fits Pontiac V8 blocks requiring oversized pistons, offering approximately 0.030 inches over stock sizing—a common choice for worn or damaged cylinders. ICON Pistons manufactures these using premium alloy materials with optimized ring grooves and pin boss geometry, providing the structural integrity necessary for sustained high-RPM operation and thermal stability in nitrous or turbocharged environments.

This piston set suits Pontiac 350, 389, 400, and 455 big-block V8 engine rebuilds and modifications where compression tuning is required for optimal fuel octane utilization or supercharger/turbo compatibility. Installation requires attention to deck height, rod length, and proper ring gap spacing—critical factors that separate reliable builds from catastrophic failures. The 14.6-pound weight of this complete set reflects the mass of eight individual pistons ready for honing, pin fitting, and ring installation by experienced engine shops or knowledgeable builders.