Wiseco 6426B6 Chevy Big Block Drag Nitrous Forged Piston 1.270 Compression Height

The Wiseco 6426B6 is a shelf-stock, single forged piston engineered specifically for Chevrolet Big Block drag and nitrous oxide applications. Built with a 1.270-inch compression height, this piston is purpose-designed to handle the extreme cylinder pressures and rapid heat loads characteristic of nitrous-injected race engines.

Key Features:

• 2618 High-Strength Aluminum Alloy — Superior tensile strength and detonation resistance compared to standard 4032 alloy, making it the preferred choice for high-stress nitrous and drag racing builds
• Full-Round Forging — Maximizes structural integrity and provides uniform strength throughout the piston for severe-duty race use
• Vertical Gas Ports — Improve ring seal and combustion efficiency under extreme cylinder pressure conditions
• Anti-Detonation & Pressure Seal Grooves — Engineered to manage detonation events and maintain ring seal under heavy nitrous loads
• 1.270-Inch Compression Height — Shelf-stock dimension designed for Chevy Big Block stroker combinations targeting a 9.780–10.195-inch zero deck height
• .180 Tool Steel Wrist Pin with Double Spirolox® — Heavy-duty pin construction resists flex and fatigue under the instantaneous loads of nitrous combustion
• CNC Race-Ready Dome — Precision-machined dome requires no deburring by the engine builder, saving time and ensuring consistency
• ArmorGlide® Skirt Coating — Dry-film lubricant permanently applied to the skirt reduces friction, improves wear resistance, and allows tighter piston-to-wall clearance

Ring groove dimensions are .043, 1/16, 3/16 — rings are sold separately. This is an individual (single) replacement piston, ideal for builders replacing one piston or assembling a custom combination. Wiseco pistons are engineered and manufactured in the USA, backed by race-proven performance across NHRA Pro Stock, Formula 1, and IRL competition.