Wiseco K0173X4 Ford 302/351 Professional Series Forged Piston Set -22cc R/Dome 4.040 in. Bore

The Wiseco K0173X4 is a Professional Series forged piston set engineered for Ford 302 and 351 small block engines running forced induction applications. Featuring a -22cc reverse dome (dish) design, this kit is purpose-built for blower and turbo builds where lower compression ratios are required to handle elevated cylinder pressures safely and reliably.

Key Features:

• 2618 High-Strength Aluminum Alloy — forged for maximum tensile strength and fatigue resistance under severe duty race conditions
• ArmorGlide® Skirt Coating — reduces friction, resists seizure, and enables tighter piston-to-wall clearances for quieter, more efficient operation
• Anti-detonation and pressure seal grooves — help contain combustion gases and protect ring lands under boost
• Strutted skirt design — optimized strength-to-weight ratio for high-RPM durability
• -22cc reverse dome (dish) volume — ideal for blower and turbocharger applications requiring reduced static compression
• Includes wrist pin (Part# S424, 0.927 in. x 2.500 in.)
• Ring set sold separately (Part# 4047GFX)

Specifications:

• Bore: 4.040 in.
• Compression Height: 1.165 in.
• Pin Diameter: 0.927 in.
• Stroke: 3.250 in.
• Rod Length: 5.400 in.
• 0-Deck At: 8.190 in.
• Standard Deck Height: 8.200 in.
• Piston Volume: -22cc
• Compression Ratio @ 54cc chamber: 8.9:1
• Compression Ratio @ 58cc chamber: 8.5:1
• Compression Ratio @ 60cc chamber: 8.4:1
• Compression Ratio @ 62cc chamber: 8.2:1

Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility, the K0173X4 Professional Series piston set delivers the custom-level performance and durability demanded by serious racers and engine builders. Compatible with TFS Twisted Wedge and similar inline valve head configurations.