Wiseco K0166X3 Ford Windsor Flat Top Forged Piston Kit TFS Twisted Wedge - 302/351 7.5cc

The Wiseco K0166X3 is a Professional Series forged piston kit engineered specifically for Small Block Ford 302/351 Windsor engines equipped with TFS (Trick Flow Specialties) Twisted Wedge cylinder heads. Featuring a flat top design with a -7.5cc valve relief volume, this shelf-stock kit is purpose-built for performance street and race applications targeting near-stock compression ratios.

Key Specifications:

• Bore: 4.030"
• Compression Height: 1.280"
• Stroke: 4.000"
• Rod Length: 6.200"
• 0 Deck At: 9.480" | Standard Deck Height: 9.500"
• Crown Volume: -7.5cc (flat top with valve reliefs)
• Compression Ratio @ 54cc chamber: 12.6:1
• Compression Ratio @ 58cc chamber: 12.0:1
• Compression Ratio @ 60cc chamber: 11.7:1
• Compression Ratio @ 62cc chamber: 11.5:1
• Valve Pockets: .350" / .250"
• Top Land: .300" - .260"
• Skirt Type: Strutted

• Premium GFX Ring Set (Part #4037GFX) — 1.2mm / 1.2mm / 3.0mm configuration
• Wrist Pin Set (Part #S424) — .927" x 2.500"

Key Features:

• ArmorGlide® Skirt Coating — reduces friction and improves break-in
• 2618 High-Strength Forged Aluminum Alloy — designed for heavy to severe-duty race builds
• Anti-detonation groove and pressure seal groove for enhanced ring sealing
• Dedicated forgings with specially designed valve pockets optimized for TFS Twisted Wedge head geometry
• Precision machined ring grooves for consistent ring seal
• Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility

The Wiseco K0166X3 piston kit delivers custom-level performance in a ready-to-ship shelf-stock package, making it an ideal choice for serious 302/351 Windsor performance builds using Trick Flow Twisted Wedge cylinder heads.