Wiseco 6398RX05 Forged Piston Chevy LS Series Bore Flat Top - 4.005in 3.2cc

The Wiseco 6398RX05 is a shelf-stock forged piston designed for Chevrolet LS-series engines, featuring a -3.2cc flat top (FT) dish and a bore size of 4.005 inches. Wiseco's shelf-stock pistons are manufactured to precise tolerances, allowing for a straightforward drop-in fitment on standard and mildly modified LS builds without the wait time of a custom order.

Wiseco is a globally recognized leader in high-performance forged pistons, with decades of proven results in racing and street performance applications. Their LS-series pistons are crafted from aerospace-grade aluminum alloy and feature Wiseco's proprietary ring groove geometry and skirt coating technology for reduced friction, improved ring seal, and extended service life.

Key Features:

• Shelf-stock availability — ready to ship without custom lead times
• -3.2cc flat top (FT) design — optimized for compression ratio tuning on LS-series applications
• 4.005-inch bore diameter — fits standard and slightly over-bored LS cylinder bores
• Forged aluminum construction — superior strength and heat resistance over cast pistons
• Designed for Chevrolet LS-series engines — including Gen III and Gen IV LS platforms
• Precision CNC machining — tight tolerances for optimal fit and performance
• Compatible with standard LS ring packages — simplifies the rebuild process

Whether you're building a street/strip LS engine or refreshing a worn block, the Wiseco 6398RX05 provides the reliability and performance engineering that professional engine builders trust. As a single-piston shelf-stock unit, it is ideal for replacing a damaged piston or completing a set for a full engine build.