Sportsman Racing Products 139625 SBC 400 Dished Forged Piston Set, 4.155 in Bore, -21 cc, Set of 8

Upgrade your Small Block Chevy engine with the Sportsman Racing Products 139625 piston set, engineered for dependable performance in demanding high-performance and racing applications. This set includes eight forged pistons designed for SBC 400 engines and features a 4.155 in bore with a dished, inverted-dome configuration and a -21.00 cc volume. The forged construction provides the strength and durability needed for sustained engine operation under demanding conditions.
The 1.425 in compression height is designed to support proper piston positioning and engine assembly when matched with compatible connecting rods, crankshaft, block, and cylinder head components. Integrated ring grooves accommodate 1/16 in, 1/16 in, and 3/16 in piston rings, helping provide a practical foundation for building a reliable and properly sealed rotating assembly. Always verify compression ratio, piston-to-valve clearance, deck height, and ring specifications before installation.
Sportsman Racing Products part number 139625 is supplied as a complete set of eight pistons for consistent cylinder-to-cylinder application. The dished design can help manage compression in combinations using larger combustion chambers or forced-induction components, depending on the complete engine configuration. These pistons are intended for Small Block Chevy 400 applications and should be installed by a qualified builder following the engine manufacturer's assembly procedures and recommended clearances.

Features:

• Brand: Sportsman Racing Products

• Part Number: 139625

• Application: Small Block Chevy 400 engines

• Construction: Forged aluminum piston design for high-performance applications

• Bore: 4.155 in

• Piston Style: Dished, inverted-dome design

• Piston Volume: -21.00 cc

• Compression Height: 1.425 in

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

• Quantity: Set of 8 pistons