Wiseco 6392RX3905 Professional Series Chevy LS Forged Piston -25cc Dish 3.905 in. Bore

The Wiseco 6392RX3905 is a Professional Series shelf-stock forged piston designed for Chevrolet LS series engines, featuring a 3.905-inch bore diameter and a -25cc dish crown for precise compression ratio tuning in high-performance and race applications. Sold individually, this piston is ideal for builders who need a single replacement or are assembling a custom combination one cylinder at a time.

Key Features:

• -25cc Dish Crown: Reduces compression ratio for use with power adders such as superchargers, turbochargers, or nitrous oxide
• 3.905 in. Bore Diameter: Encoded directly in the part number for easy spec verification
• 2618 Forged Aluminum Construction: Engineered, forged, and machined in the USA for improved tensile strength suited to heavy-duty and severe-duty race builds
• ArmorGlide® Skirt Coating: Seizure-resistant, friction-reducing coating for quieter operation and reduced skirt and cylinder wall wear
• Precision Ring Grooves: Fully machined crown features and precision ring grooves for consistent sealing and long service life
• Professional Series — Shelf Stock: Ready-to-ship inventory for faster turnaround on builds; no custom lead times required

Wiseco's Professional Series pistons are engineered for serious racers and engine builders who demand no-compromise performance. Forged and machined at Wiseco's Mentor, Ohio facility, these pistons deliver the strength and precision required for naturally aspirated, turbocharged, supercharged, and nitrous-fed LS builds. The 6392RX3905 pairs with a wide range of LS connecting rods and stroker combinations — always confirm compression height compatibility with your specific rod length and stroke when finalizing your build.