Wiseco K464X3903 Professional Series Forged Piston Set GM LS 3.903 in. Bore -3cc Dome

The Wiseco K464X3903 is a Professional Series forged piston kit engineered for Chevrolet LS-series stroker engine builds. Featuring a 3.903-inch bore, 4.000-inch stroke, 6.125-inch rod length, and a -3cc dome, this set is purpose-built for high-output, heavy-duty race applications demanding precision and durability.

Key Features:

• Forged from 2618 aluminum — engineered and machined in the USA for superior tensile strength and heat resistance
• ArmorGlide® skirt coating — reduces friction, improves scuff resistance, enables tighter bore fitment, and allows quieter operation
• Reluctor ring accommodation — designed to clear the reluctor ring on stroker cranks without notching the pin bosses
• Offset pins and OE-style skirt shapes — specifically engineered for street and performance applications
• Anti-detonation and pressure seal grooves — improve ring seal, reduce piston rock noise, and enhance overall performance
• Includes gas-nitrided rings — premium ring set included with each piston kit
• 0.927 in. wrist pin diameter — matched to LS-series stroker specifications
• 1.110 in. compression height

Specifications:

• Bore: 3.903 in. (99.136 mm)
• Stroke: 4.000 in.
• Rod Length: 6.125 in.
• Compression Height: 1.110 in.
• Pin Diameter: 0.927 in.
• Dome Volume: -3cc
• Piston Weight: ~430 grams (advertised)
• Piston Style: Dome with two valve reliefs
• Material: Forged aluminum

Note: Requires aftermarket connecting rods. The Wiseco K464X3903 Professional Series piston set is an ideal foundation for a high-horsepower LS stroker build, combining race-proven technology with street-friendly engineering.