SBM FT Forged Piston Set 4.030 Bore -5cc

The ICON PISTONS SBM FT Forged Piston Set 4.030 Bore -5cc is a premium forged piston set engineered for Small Block Mopar applications requiring precision and durability at high RPM. This eight-piston set features a 4.030-inch bore with -5cc dome geometry and ring grooves sized at 1/16 x 1/16 x 3/16 inches, delivering the compression ratio and ring sealing characteristics demanded by serious engine builders and performance enthusiasts.

Forged construction provides superior strength and thermal stability compared to cast alternatives, critical for sustained high-boost applications, nitrous oxide use, or extended track sessions where piston temperatures and combustion pressures spike dramatically. The -5cc dome reduces displacement slightly while raising compression ratio, a common specification for overbored Small Block Mopar builds targeting increased horsepower without requiring larger displacement. Ring groove dimensions are precisely controlled to minimize blowby and maintain optimal ring tension across the entire RPM band, protecting cylinder walls and extending engine life.

This piston set suits engine builders, restoration specialists, and performance shops preparing Small Block Mopar engines for racing, hot rod applications, or high-output street builds where reliability under extreme conditions is non-negotiable. The 4.030-inch bore specification accommodates blocks that have been bored beyond original size, a standard practice in engine rebuilds and performance modifications. Proper installation requires professional machine shop alignment and measurement to ensure deck height, ring gap, and piston-to-valve clearance are verified according to manufacturer specifications.