Wiseco K0173X155 Ford 302/351 Forged Piston Kit -22cc Dish 4.155 Bore

The Wiseco K0173X155 is a professional-series forged piston kit designed for Ford Small Block 302 and 351 engines running forced induction applications. Built from 2618 high-strength aluminum alloy, these blower/turbo dish pistons feature a -22cc reverse dome (dish) combustion chamber volume, making them ideal for supercharged and turbocharged builds where lower compression ratios are required for reliable power under boost.

Each piston is finished with Wiseco's proprietary ArmorGlide® skirt coating, which reduces friction, improves wear resistance, and helps protect the piston during cold starts and high-load conditions. The strutted skirt design provides superior rigidity and dimensional stability under extreme heat and pressure.

Key Specifications:

• Bore: 4.155 in.
• Compression Height (CH): 1.165 in.
• Stroke: 3.250 in.
• Rod Length: 5.400 in.
• 0 Deck At: 8.190 in.
• Standard Deck Height: 8.200 in.
• Dish Volume: -22cc
• Compression Ratio @ 54cc chamber: 9.3:1
• Compression Ratio @ 58cc chamber: 9.1:1
• Compression Ratio @ 60cc chamber: 8.8:1
• Compression Ratio @ 62cc chamber: 8.6:1
• Wrist Pin: .927 in. x 2.500 in. (Pin P/N S424 — Included)
• Ring Grooves: 1/16, 1/16, 3/16 (Rings sold separately — Ringset P/N 4158GFX)
• Valve Pockets: .310 in. / .260 in.
• Top Land: .350 in. – .250 in.
• Skirt Type: Strutted
• Head Compatibility: TFS Twisted Wedge heads

Kit Includes:

• Wrist pins (P/N S424)
• Anti-detonation and pressure seal grooves

Engineered and manufactured in Wiseco's Mentor, Ohio facility using state-of-the-art forging and CNC machining equipment, these pistons deliver the strength and precision demanded by serious performance engine builders. Note: Ring set (P/N 4158GFX) is sold separately.