Wiseco K0419X185 Chevy LS 3.900 Stroker Forged Piston Kit with .927 Pin

The Wiseco K0419X185 is a forged piston kit for Chevrolet LS engines built around an aftermarket 3.900-inch stroke crankshaft. Optimized specifically for the 3.900" stroke rod angle, these pistons deliver smoother, more precise operation while reducing bore distortion, crank and rod stress, and helping maintain a consistent ring seal throughout the RPM range.

Key Features:

• Bore Size: 3.785 in.
• Compression Height: 1.165 in. — increased height reduces piston rock and improves cylinder stability for a more reliable ring seal
• Pin Diameter: 0.927 in. with heavy-duty H13 tool steel wrist pins included
• Material: Forged in-house from 2618 high tensile strength aluminum alloy for superior durability in high-stress and power-adder applications
• Ring Pack Included: 1.2mm, 1.2mm, 3.0mm GFX piston rings
• Strutted design for maximum strength at minimum weight
• ArmorGlide® skirt coating reduces friction and improves power output
• Engineered, forged, and machined in the USA at Wiseco's Mentor, Ohio facility

With compression ratio options spanning 9.1:1 to 13.4:1, this kit is well-suited for both naturally aspirated and forced-induction builds. Potential displacements with the 3.900" stroke range from 350 to 429 cubic inches depending on bore size. These pistons are built to the exacting standards Wiseco has maintained for over 80 years of motorsports manufacturing.