SKU: KBP9904HC.030
UPC: 800745119100
MPN: 9904HC.030
The KB PERFORMANCE PISTONS SBC Domed Piston Set 4.030 Bore +4cc represents a proven hypereutectic piston solution engineered for Small Block Chevy engines demanding reliable compression and consistent performance across varied operating conditions. This eight-piston set features domed piston geometry that increases combustion chamber displacement by 4 cubic centimeters, allowing builders and engine tuners to achieve higher compression ratios without block machining.
Each piston in this SBC domed piston set is manufactured from hypereutectic aluminum, a material composition that offers superior strength-to-weight characteristics and thermal stability compared to standard cast aluminum. The 4.030-inch bore specification matches modern Small Block Chevy platform dimensions, while the 5/64 x 5/64 x 3/16-inch ring groove configuration accommodates standard SBC ring packages. The +4cc dome volume is particularly valuable for street and performance engines where increasing effective compression ratio improves throttle response, fuel efficiency, and power delivery without requiring expensive block modifications.
This claimer-series piston set serves engine builders, restoration specialists, and performance enthusiasts working on Small Block Chevy platforms from 1968 onward. The domed design is particularly suited for engines targeting compression ratios between 9.5:1 and 11:1, making these pistons applicable to both naturally aspirated street engines and moderate boost applications. A complete eight-piston set simplifies ordering for full Small Block Chevy engine rebuilds, eliminating the need to source individual units.
KB Performance Pistons maintains a strong reputation in the Small Block Chevy aftermarket for delivering economical piston solutions that balance cost efficiency with dimensional accuracy. The hypereutectic construction and verified ring groove dimensions ensure compatibility with existing SBC rotating assemblies, reducing fitment complications during engine assembly.
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