Sportsman Racing Products 138090 SBC Flat Top Forged Piston Set, 4.040 in Bore, -5 cc, Set of 8

The Sportsman Racing Products 138090 piston set is designed for Small Block Chevy applications requiring dependable forged construction and a flat-top piston profile. This set includes eight pistons with a 4.040 in bore size and a 1.425 in compression height, providing a practical solution for performance engine builds and rebuilds where consistent fit and durability are important.
Each piston features a flat-top crown with a nominal -5.00 cc volume and ring grooves sized for 1/16 in, 1/16 in, and 3/16 in rings. The forged design supports the demands of high-performance use while maintaining the application-specific characteristics needed for Small Block Chevy engine assemblies. Verify bore size, compression height, ring selection, and engine specifications before installation.
The Sportsman Racing Products 138090 set is supplied as a matched group of eight pistons for efficient engine assembly. Its straightforward flat-top configuration makes it suitable for builders seeking a clean piston design for compatible SBC combinations. Professional installation and careful measurement are recommended to confirm piston-to-wall clearance, deck height, compression ratio, and valve clearance for the intended application.

Features:

• Brand: Sportsman Racing Products

• Part Number: 138090

• Application: Small Block Chevy engines

• Piston Design: Flat-top forged piston

• Bore Size: 4.040 in

• Compression Height: 1.425 in

• Piston Volume: -5.00 cc

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

• Quantity: Set of 8