SBM Flat Top Piston Set 4.080 Bore -6cc

The KB Performance Pistons SBM Flat Top Piston Set 4.080 Bore -6cc is a hypereutectic piston kit specifically designed for small block Mopar engines. This eight-piston set is engineered for precision bore sizing and specific compression geometry, making it ideal for modified street and performance applications.

Each piston in the set features a 4.080-inch bore diameter and a -6.00 cubic centimeter compression cavity, along with carefully sized ring grooves (5/64 x 5/64 x 3/16 inches) that ensure proper ring seal and oil control across varying RPM ranges. The hypereutectic construction provides superior heat transfer and dimensional stability compared to cast aluminum alternatives, which is critical for engines operating under high load or boost conditions.

Engine builders and performance technicians will find the KB 243.040 piston set particularly beneficial when rebuilding small block Mopar platforms, especially when factory specifications do not meet the desired power targets. Whether for vintage drag racing engines, street performance upgrades, or marine applications, this piston set delivers the precision and durability necessary for reliable long-term service.