Wiseco 6398LX3903 Forged Piston Chevy LS Series 3.903 in. Bore -3.2cc Flat Top

The Wiseco 6398LX3903 is a Professional Series shelf-stock forged piston designed for Chevrolet LS series engines. With a 3.903-inch bore and -3.2cc flat top crown, this single piston is built to deliver maximum performance and durability in heavy to severe duty race applications.

Key Features:

• 2618 Forged Aluminum Construction ? Engineered, forged, and machined in the USA for superior tensile strength and long-term reliability
• ArmorGlide? Skirt Coating ? Provides seizure resistance, reduces friction, and promotes quieter operation
• Fully Machined Crown ? Precision ring grooves, anti-detonation groove, and enhanced ring seal features for consistent combustion chamber efficiency
• Forced Pin Oiling ? Ensures effective wrist pin lubrication under extreme operating conditions
• Floating Wrist Pin Design ? 0.927 in. diameter 5115 steel wrist pin included
• Ring Package Included ? Ships with a premium matched ring set (0.047 in. top and second compression rings, 3.0 mm oil ring)
• Shelf Stock Availability ? Ready to ship without the lead time of a custom piston order

Specifications:

• Bore: 3.903 in.
• Piston Volume: -3.2cc (Flat Top)
• Compression Height: 1.304 in.
• Wrist Pin Diameter: 0.927 in.
• Wrist Pin Style: Floating
• Piston Material: 2618 Aluminum
• Pin Material: 5115 Steel
• Top Compression Ring Thickness: 0.047 in.
• Second Compression Ring Thickness: 0.047 in.
• Oil Ring Thickness: 3.0 mm
• Forging Type: Strutted
• Product Series: Professional
• Sold as: Single Piston

Wiseco's Professional Series pistons are the choice of serious engine builders seeking custom-level durability in a shelf-stock package. Each piston is manufactured at Wiseco's Mentor, Ohio facility using state-of-the-art 3D design and finite element modeling to deliver an optimal balance of strength and lightweight performance.