Wiseco K447X05 Professional Series Forged Piston Set GM LS 4.005 in. Bore +12cc Dome

The Wiseco K447X05 is a Professional Series forged piston set engineered for GM Chevrolet LS-based platforms running a 3.622-inch stroke and 6.125-inch connecting rod.

Key Features:

• Forged from 2618 aluminum in the USA for improved tensile strength and durability in high-performance and power-adder applications
• +12cc dome crown with a fully machined profile for enhanced combustion chamber efficiency and high-compression ratios
• ArmorGlide® skirt coating reduces operating friction and noise while minimizing skirt and cylinder wall wear
• Strutted skirt design engineered to run at as little as 0.004-inch clearance with excellent wear characteristics
• Offset wrist pins match OE geometry; skirt profile specifically designed for quiet street operation
• Accommodates the reluctor ring on stroker cranks without requiring notching of the pin bosses
• Radiused valve pockets for improved detonation resistance and increased flow around the valves
• Includes GFX 1.2/1.2/3.0mm steel top / Napier 2nd ring set — no additional ring purchase required
• Dedicated LS-specific forging with optimized dome and crown design, specialized valve pockets, and precision-machined ring grooves

Specifications:

• Bore: 4.005 in.
• Stroke (suited for): 3.622 in.
• Rod Length (suited for): 6.125 in.
• Compression Height: 1.300 in.
• Pin Diameter: 0.927 in.
• Crown Style: +12cc Dome

The Wiseco Professional Series K447X05 piston kit delivers custom-level performance features straight out of the box, making it one of the most capable shelf-stock LS piston options available for serious engine builders targeting high horsepower street and race applications.