Sportsman Racing Products 149721 Pontiac 455 Forged Flat Top Piston Set, 4.185 in Bore, -5 cc, Set of 8

Upgrade your Pontiac V8 engine with the Sportsman Racing Products 149721 forged flat top piston set. Designed for Pontiac 455 applications, this matched set of eight pistons provides a durable foundation for performance engine builds. The flat top design and minus 5.00 cc volume support compression ratio planning while maintaining compatibility with properly matched Pontiac V8 components.
The 149721 pistons feature a 4.185 in bore size and a 1.480 in compression height for precise fitment in compatible Pontiac 455 engine assemblies. Forged construction offers strength and durability for demanding street, track, and high-performance applications. Always verify block machining, connecting rod specifications, deck height, combustion chamber volume, and compression ratio requirements before installation.
The integrated ring grooves accept 1/16 in, 1/16 in, and 3/16 in piston rings. Rings are not specified as included, so confirm the contents of the package before completing your engine build. Professional installation is recommended, including proper piston-to-wall clearance, ring-gap adjustment, balancing, and final inspection according to the engine builder’s specifications.
Feature: Brand: Sportsman Racing Products
Feature: Part number: 149721
Feature: Application: Pontiac 455 and compatible Pontiac V8 engine builds
Feature: Construction: Forged aluminum
Feature: Piston style: Flat top
Feature: Bore size: 4.185 in
Feature: Compression height: 1.480 in
Feature: Piston volume: Minus 5.00 cc
Feature: Ring grooves: 1/16 in, 1/16 in, and 3/16 in
Feature: Quantity: Set of 8

Features:

• Brand: Sportsman Racing Products

• Part number: 149721

• Application: Pontiac 455 and compatible Pontiac V8 engine builds

• Construction: Forged aluminum

• Piston style: Flat top

• Bore size: 4.185 in

• Compression height: 1.480 in

• Piston volume: Minus 5.00 cc

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

• Quantity: Set of 8