Wiseco K0033B4 SBC 23-Degree 13.5cc Dome GasPorted Forged Piston Kit 4.165 Bore

The Wiseco K0033B4 is a Professional Series forged piston kit engineered for Small Block Chevy (SBC) applications using 23-degree cylinder heads. Featuring a 1.120" compression height, 13.5cc dome volume, and 4.165" bore diameter, this kit is purpose-built for high-compression race engine builds. Offered as a Build to Stock (build-on-demand) kit, it is part of Wiseco's renowned "Lil Quick 16" platform designed for serious racers and engine builders.

Key Features:

• 23-Degree SBC Head Design – Optimized dome geometry for use with 23-degree Small Block Chevy cylinder heads
• 13.5cc Positive Dome – Engineered for high compression ratio builds
• 1.120" Compression Height – Precise dimensional control for accurate deck clearance
• 4.165" Bore Diameter – Sized for stroked or overbored SBC applications
• GasPorted Design – Lateral gas ports improve ring seal and reduce blow-by for maximum power
• Forged 2618 High-Strength Alloy – Superior impact resistance and fatigue strength compared to cast pistons
• ArmorGlide® Skirt Coating – Reduces friction and wear for extended engine life
• Radiused Valve Pockets & CNC Race-Ready Dome – Precision-machined for optimal flow and clearance
• Anti-Detonation & Pressure Seal Grooves – Helps prevent detonation and improves combustion sealing
• Strutted High-Strength Design – Lightweight yet structurally reinforced for high-RPM durability
• .150" Wall Wrist Pin with Spirolox® Retainers – Pin upgrade available for applications over 700hp (Pin P/N S703)
• Ring Groove: .043" / .043" / 3.0mm – Rings sold separately
• Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility

The Wiseco K0033B4 is a build-on-demand piston kit intended for race engine builders who require custom-level performance in a shelf-stock platform. As with all Wiseco Professional Series pistons, rings are sold separately. This kit delivers the precision and durability demanded by competitive racing applications.