Sportsman Racing Products 139478 BBC Flat Top Forged Piston Set, 4.310-Inch Bore, -3 cc, Big Block Chevy

Upgrade your Big Block Chevy engine with the Sportsman Racing Products 139478 flat top forged piston set. Designed for performance-focused engine builds, this set includes eight durable forged pistons engineered for a 4.310-inch cylinder bore and a 1.645-inch compression height. The flat top design supports consistent combustion chamber clearance and is suited to applications where precise compression characteristics are required.
The Sportsman Racing Products 139478 pistons feature a -3.00 cc dish volume and ring grooves sized for 1/16-inch, 1/16-inch, and 3/16-inch rings. Forged construction provides strength and durability for demanding street, strip, and competition applications when matched with the appropriate connecting rods, crankshaft, cylinder heads, and engine setup. Always verify piston-to-wall clearance, deck height, valve clearance, and final compression ratio before installation.
This Big Block Chevy piston set is supplied as a complete set of eight and is intended for builders seeking reliable replacement or performance-oriented components. Use the brand and part number, Sportsman Racing Products 139478, to confirm compatibility with your specific engine combination and ring package. Professional installation and thorough measurement are recommended to ensure proper fit, ring seating, and long-term performance.

Features:

• Brand: Sportsman Racing Products

• Part Number: 139478

• Application: Big Block Chevy

• Design: Flat top forged piston

• Bore Size: 4.310 inches

• Compression Height: 1.645 inches

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

• Dish Volume: -3.00 cc

• Quantity: Set of 8