Wiseco K0033B15 SBC 23-Degree 1.120 Compression Height 13.5cc Dome Gasported Piston Kit

The Wiseco K0033B15 is a Professional Series forged piston kit designed for the Small Block Chevrolet (SBC) 400 platform using 23-degree cylinder heads. Featuring a 13.5cc positive dome and a 1.120-inch compression height, this kit is purpose-built for high-compression race and performance engine builds. Lateral gas porting (gasported) improves ring seal and combustion efficiency at wide-open throttle.

Wiseco's K0033 series falls within their renowned "Lil Quick 16" hollow dome lineup — a strutted, high-strength piston design engineered for maximum durability under race conditions. Each piston is forged and CNC-machined in the USA from 2618 high-strength aluminum alloy, offering superior tensile strength and heat resistance compared to conventional cast pistons.

Key Features:

• 23-degree SBC cylinder head compatibility with 13.5cc hollow dome
• 1.120-inch compression height for precise deck clearance tuning
• Lateral gas ports (gasported) for enhanced ring seal and combustion pressure management
• ArmorGlide® skirt coating for seizure resistance, friction reduction, and quieter operation
• 2618 high-strength aluminum alloy forging — engineered, forged, and machined in the USA
• Radiused valve pockets and CNC race-ready dome profile
• Int. .310" valve pocket depth (unique to the K0033 series)
• .150-inch wall tool steel wrist pin included with Spirolox® retaining rings
• Anti-detonation and pressure seal grooves for improved ring stability
• Pin upgrade recommended for builds exceeding 700 hp (use Pin P/N S703)
• Rings sold separately — .043 / .043 / 3.0mm ring pack recommended
• Compression ratio calculated at 0-deck with .040-inch head gasket

Wiseco Professional Series piston kits are the choice of serious racers and engine builders who demand no-compromise quality and race-proven durability.