Wiseco K0427X145 Chevy LS 3.900 Stroker Forged Piston Kit 4.145 Bore .927 Pin

The Wiseco K0427X145 is a Professional Series forged piston kit designed for Chevrolet LS engines built around a 3.900-inch stroker crankshaft.

These LS stroker pistons are optimized for the 3.900-inch stroke rod angle, which promotes smoother operation, reduces bore distortion, minimizes crank and rod stress, and helps maintain a consistent ring seal throughout the RPM range. Each piston is engineered, forged, and machined entirely in the USA at Wiseco's Mentor, Ohio manufacturing facility using 2618 high-strength aluminum alloy for superior tensile strength compared to standard cast pistons.

Key Features:

• Bore Size: 4.145 inches
• Stroke Application: 3.900-inch stroker
• Pin Diameter: 0.927 inches (designed for use with aftermarket connecting rods)
• 2618 High-Strength Forged Aluminum construction for improved tensile strength and heat resistance
• ArmorGlide Skirt Coating — seizure-resistant, friction-reducing, and quieter operation
• Fully machined crown features with precision ring grooves
• Anti-detonation ring groove design for enhanced durability under high-stress conditions
• Optimized rod angle geometry reduces bore distortion and crank stress
• Manufactured in the USA at Wiseco's Mentor, Ohio facility

Wiseco's Professional Series represents a no-expense-spared approach to piston design, packed with custom-level performance features and supplied with premium rings. These pistons are built for heavy to severe duty race builds where reliability and power are equally critical.