SBC Dished Piston Set 4.030 Bore -18cc

The SBC Dished Piston Set 4.030 Bore -18cc from KB Performance Pistons delivers reliable, high-performance power for small block Chevy engines demanding precision and durability. This hypereutectic piston set is engineered for builders and enthusiasts who require tight tolerances and consistent performance across all eight cylinders. Whether you're building a street engine, a weekend warrior, or a performance-focused application, these pistons provide the foundation for reliable combustion and long-term dependability.

Constructed from hypereutectic aluminum alloy, the SBC Dished Piston Set features a 4.030-inch bore diameter with a dished crown design that yields a -18cc compression chamber volume—ideal for fine-tuning compression ratios in stroker kits or modified displacement applications. The piston ring grooves measure 5/64 x 5/64 x 3/16 inches, accommodating standard small block Chevy ring packages with precision fit and minimal blowby. The dished crown geometry optimizes combustion chamber efficiency while reducing piston-to-valve clearance risk, a critical consideration in high-lift camshaft configurations or heads with aggressive valve jobs.

Mechanics, engine builders, and performance enthusiasts choose KB Performance Pistons for their consistent quality and proven track record in competitive and street applications. These pistons are fully compatible with standard small block Chevy rod lengths and are ideal for use in 327, 350, 383, or 400 cubic-inch builds where bore size and compression tuning are critical. Installation requires proper honing of cylinder bores to the specified tolerance and careful assembly with quality rod bearings and fasteners to maximize service life and reliability.