Wiseco 6398LX05 Forged Chevy LS Piston 4.005in Bore -3.2cc Flat Top Professional Series

The Wiseco 6398LX05 is a Professional Series forged piston engineered for Chevrolet LS-Series engines. Designed for 4.005-inch bore applications, this individual shelf-stock piston features a flat-top crown with a -3.2cc dish volume, making it ideal for high-compression street and race builds that demand reliable, repeatable performance.

Key Features:

• Bore Diameter: 4.005 in.
• Compression Height (CH): 1.3045 in.
• Piston Volume: -3.20 cc (flat top)
• Wrist Pin Diameter: 0.927 in.
• Wrist Pin Style: Full-floating
• Wrist Pin Material: 5115 chrome-moly steel
• Top Compression Ring Groove Thickness: 0.047 in.
• Material: 2618 forged aluminum for superior tensile strength in high-load and power-adder applications
• Skirt Coating: ArmorGlide® — seizure-resistant, friction-reducing, and quieter operation
• Anti-detonation groove helps keep the top ring groove free of carbon buildup
• Strutted skirt design for maximum strength and minimal noise or piston rock
• Radiused valve pockets for improved flow and detonation resistance
• Sold individually — single piston (shelf stock)

Engineered, forged, and machined entirely in the USA at Wiseco's Mentor, Ohio facility, the Professional Series represents Wiseco's highest tier of automotive piston construction. Whether you're building a naturally aspirated race motor or a boosted street engine, the 6398LX05 delivers the dimensional precision and material strength required for demanding LS performance applications.