Sportsman Racing Products 138081 SBC Flat Top Forged Piston Set, 4.030-Inch Bore, Set of 8

Upgrade your small block Chevy engine with the Sportsman Racing Products 138081 forged flat-top piston set. Designed for 350 cubic-inch applications, this set includes eight pistons engineered for dependable performance in high-performance and competition-oriented builds. The 4.030-inch bore size supports precision engine assembly and consistent piston-to-cylinder fit when matched with the correct components and machining specifications.
The flat-top design provides a minus 5.00 cc piston volume and is suitable for builders selecting compression characteristics based on cylinder head, gasket, and deck-height specifications. Each piston features a 1.560-inch compression height and ring grooves sized for 1/16-inch, 1/16-inch, and 3/16-inch rings. This configuration helps support proper ring selection and reliable oil control when assembled according to the engine builder’s clearances and recommendations.
Sportsman Racing Products part number 138081 is supplied as a complete set of eight forged pistons for small block Chevy applications. Forged construction provides a strong foundation for performance engines, while the consistent set design helps simplify matched-component installation. Verify bore size, compression height, valve clearance, ring package, and required piston-to-wall clearance before assembly to ensure compatibility with your specific engine combination.

Features:

• Brand: Sportsman Racing Products

• Part Number: 138081

• Application: Small block Chevy 350 cubic-inch engines

• Piston Style: Forged flat-top design

• Bore Size: 4.030 inches

• Compression Height: 1.560 inches

• Piston Volume: Minus 5.00 cc

• Ring Grooves: 1/16 inch, 1/16 inch, and 3/16 inch

• Quantity: Set of 8 pistons