Wiseco K393X125 Professional Series Forged Piston Set Chevy LS 4.125 in. Bore -25cc Dish

The Wiseco K393X125 is a Professional Series forged piston set engineered for Chevrolet LS and LSX platform engines.

Key Features:

• Forged 2618 aluminum construction — engineered, forged, and machined in the USA for superior tensile strength in high-demand applications
• -25cc dish crown — optimizes compression ratio for high-performance street and race LS/LSX builds
• 4.125 in. bore / 1.304 in. compression height / 0.927 in. pin diameter
• ArmorGlide® skirt coating — reduces operating friction, minimizes wear, and allows tighter piston-to-wall clearances than uncoated pistons
• Anti-detonation and pressure seal grooves — improves ring seal, reduces piston rock noise, and enhances overall performance
• Reluctor-ring compatible — accommodates the reluctor ring on stroker cranks without requiring notching of pin bosses
• Offset pins matching OE geometry, with skirt shapes optimized for street and performance use
• Includes Wiseco GFX ring set — positive-twist top ring and Napier scraper second ring included

Wiseco Professional Series piston kits are designed for heavy to severe-duty race builds, delivering custom-level performance features in a shelf-stock package. Designed specifically for Chevrolet LSX engine blocks, these pistons have been validated in the highest horsepower applications.