BBC Domed Piston Set 4.125 Bore +17cc

The KB Performance Pistons BBC Domed Piston Set 4.125 Bore +17cc is a hypereutectic piston package designed specifically for big-block Chevy engines that require increased compression and combustion chamber volume. This set is ideal for applications such as street performance, bracket racing, and vintage restoration, where precise bore sizing and dome geometry are essential for achieving target compression ratios.

Engineered with a dome volume of +17.00cc, each piston features a 4.125-inch bore diameter and precisely machined ring grooves (5/64 x 5/64 x 3/16 inches) to ensure consistent ring seal and oil control. The hypereutectic aluminum construction provides excellent dimensional stability across temperature extremes and resists scuffing in high-RPM environments, making these pistons suitable for both naturally aspirated and moderately boosted applications.

Builders working on BBC engines from the 1965–1996 generation will find this piston set particularly beneficial, as it accommodates popular big-block configurations and intake manifolds. With a total of 8 pistons included in the set, this product is a comprehensive solution for those looking to enhance their engine's performance and efficiency.