Sportsman Racing Products 139531 BBC High-Compression Domed Forged Piston Set, 4.310-Inch Bore, +48cc

Upgrade your Big Block Chevy engine with the Sportsman Racing Products 139531 high-compression domed piston set. Designed for performance-focused builds, these forged pistons feature a domed crown that helps increase compression and support improved power potential when matched with the appropriate cylinder heads, combustion chamber volume, and engine components. The set includes eight pistons for a complete V8 application.
The 139531 pistons are engineered for a 4.310-inch bore and feature a 1.645-inch compression height for compatibility with properly configured Big Block Chevy rotating assemblies. Their +48cc dome volume provides a substantial compression increase, making them well suited to naturally aspirated racing and high-performance street applications where precise compression-ratio planning is essential. Always verify piston-to-valve clearance, deck height, connecting rod specifications, and final compression ratio before installation.
Each piston is machined with 1/16-inch, 1/16-inch, and 3/16-inch ring grooves to accept compatible performance piston rings. The forged construction provides the strength and durability needed for demanding engine environments, while the application-specific design supports reliable fitment when used with properly matched components. This Sportsman Racing Products piston set is a strong choice for builders seeking durable forged internals and increased compression in a Big Block Chevy engine.

Features:

• Brand: Sportsman Racing Products

• Part Number: 139531

• Application: Big Block Chevy V8 engines

• Design: High-compression domed piston

• Construction: Forged for performance engine applications

• Bore Size: 4.310 inches

• Compression Height: 1.645 inches

• Dome Volume: Plus 48.00 cc

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

• Quantity: Set of 8 pistons