Sportsman Racing Products 138100 SBC Flat Top Forged Piston Set, 4.155 in Bore, Set of 8

Upgrade your Small Block Chevy engine with the Sportsman Racing Products 138100 forged flat top piston set. Designed for performance-focused engine builds, these pistons feature a 4.155-inch bore size and a 1.125-inch compression height to support precise fitment and dependable operation in compatible SBC applications. The flat top design and minus 5.00 cc volume help builders achieve the desired compression characteristics when matched with the appropriate cylinder head, gasket, and rotating assembly components.

Each piston is manufactured with forged construction for strength and durability under demanding engine conditions. The 1/16-inch, 1/16-inch, and 3/16-inch ring grooves accommodate commonly used performance piston ring configurations, helping provide consistent sealing when properly prepared and installed. These pistons are intended for engine builders who require reliable components for street performance, racing, restoration, or custom Small Block Chevy projects.

The Sportsman Racing Products 138100 set includes eight pistons for a complete V8 engine build. Verify bore size, compression height, ring package, piston-to-wall clearance, connecting rod compatibility, valve clearance, and compression requirements before installation. Proper machining, balancing, ring preparation, and professional assembly practices are essential for achieving the best results and long-term performance from this forged piston set.

Features:

• Brand: Sportsman Racing Products

• Part Number: 138100

• Application: Small Block Chevy engines

• Construction: Forged aluminum piston design

• Piston Style: Flat top

• Bore Size: 4.155 inches

• Compression Height: 1.125 inches

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

• Piston Volume: Minus 5.00 cc

• Quantity: Set of 8