Sportsman Racing Products 139833 BBC High-Compression Forged Domed Pistons, 4.320-Inch Bore, +43 cc, Set of 8

Build dependable high-compression performance for your Big Block Chevy engine with the Sportsman Racing Products 139833 piston set. These forged domed pistons are designed for racing and high-performance applications that demand strength, durability, and consistent power from the rotating assembly. The 4.320-inch bore configuration and +43 cc dome volume support compression-focused engine combinations when matched with the appropriate cylinder heads, gasket thickness, and deck height.
The 139833 pistons feature a 1.270-inch compression height and 1/16-inch, 1/16-inch, 3/16-inch ring grooves for compatibility with commonly used performance piston ring packages. Forged construction provides a strong foundation for demanding operating conditions, while the domed crown is engineered to help increase compression potential in Big Block Chevy builds. Professional measurement and careful assembly are recommended to verify piston-to-valve, piston-to-head, and skirt clearances before operation.
This Sportsman Racing Products set includes eight pistons, making it a convenient choice for a complete V8 rebuild or performance upgrade. Use the part number 139833 when selecting compatible rings, pins, bearings, and related engine components. The pistons are supplied as a matched set for Big Block Chevy applications and should be installed by a qualified engine builder following the applicable manufacturer specifications and clearances.

Features:

• Brand: Sportsman Racing Products

• Part Number: 139833

• Application: Big Block Chevy performance engines

• Construction: Forged aluminum piston design

• Piston Style: High-compression domed crown

• Bore: 4.320 inches

• Compression Height: 1.270 inches

• Dome Volume: Plus 43.00 cc

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

• Quantity: Set of 8 pistons