BBC FHR Domed Piston Set 4.280 Bore +18.3cc

The ICON PISTONS BBC FHR Domed Piston Set 4.280 Bore +18.3cc is a forged piston assembly purpose-built for big block Chevrolet high-performance and racing applications. This eight-piece set features a domed piston design that increases combustion chamber volume by 18.3 cubic centimeters, optimizing compression geometry for power and efficiency in forced-induction and naturally aspirated big block builds. The 4.280-inch bore specification ensures precise fitment in standard big block Chevrolet blocks, while the forged construction delivers the strength and fatigue resistance required for sustained high-RPM operation.

The piston features precisely engineered ring grooves sized at 5/64 x 5/64 x 3/16 inches, optimized for both compression and oil-control ring performance across a wide RPM range. The domed crown geometry increases effective compression ratio and improves fuel burn efficiency, critical factors in maximizing power output from big block displacement. Forged piston construction provides superior material strength compared to cast alternatives, essential for withstanding the extreme combustion pressures generated in boosted or high-compression big block builds where reliability and longevity are non-negotiable.

This piston set is engineered for builders and engine shops preparing big block Chevrolet engines for competition, street performance, or marine duty applications. Buyers selecting BBC FHR pistons typically prioritize aggressive compression ratios, turbo or supercharger compatibility, and multi-round reliability in demanding duty cycles. ICON PISTONS is recognized within the engine building community for precision manufacturing and quality control, making this forged set a critical component for serious big block projects requiring verified durability and consistent performance across thousands of load cycles.