Wiseco K0099B4 Professional Series Chevy Small Block 350 Piston Kit -1.7cc Flat Top 4.040 in. Bore

The Wiseco K0099B4 is a Professional Series forged piston kit designed for the Chevrolet Small Block 350 in Pro Late Model and circle track racing applications. Built to stock compression with a -1.7cc flat top dish and a 4.040 in. bore, this kit delivers the tight tolerances and race-proven durability demanded by serious engine builders.

Key Features:

• Professional Series construction — engineered for heavy to severe duty race builds with no-expense-spared design
• Forged aluminum alloy — provides superior strength, reduced weight, and improved heat transfer over cast pistons
• -1.7cc flat top piston — optimized for Pro Late Model and stock-compression circle track builds targeting 21–23 degree cylinder heads
• 4.040 in. bore diameter — a popular overbore size for rebuilt or freshened Chevy SB 350 engines
• 0.927 in. wrist pin diameter — matches standard SBC Professional Series pin spec for reliable small-end bearing life
• Premium ring set included — kit comes complete with Wiseco's high-quality piston rings for a complete installation package
• Engineered and machined in the USA — manufactured at Wiseco's Mentor, Ohio facility on cutting-edge CNC equipment

Wiseco Professional Series pistons are purpose-built for racers who demand custom-level performance in a shelf-stock package. MPN: K0099B4. Rings are included in the kit.