Wiseco 6498B6 Professional Series Forged Piston 4.560 in. Bore Chevy Big Block Quick 8

The Wiseco 6498B6 is a Professional Series forged racing piston built for serious Chevy Big Block race engine builders who demand no-compromise performance. Engineered, forged, and machined in the USA from 2618 aluminum alloy, this individual replacement piston delivers the tensile strength and thermal stability required for heavy to severe duty race applications, including naturally aspirated and nitrous oxide builds.

This piston features an 18-degree solid dome (+15.6cc) with gas porting, a strutted skirt design, and is sized for a 4.560 in. bore with a 1.215 in. compression height, designed to fit a 9.750 in. deck height block. Wrist pin S462 is included. Rings are sold separately — recommended ring set: W77008-4560-5.

Key Features:

• 2618 forged aluminum alloy construction for maximum tensile strength and fatigue resistance under sustained high-load race conditions
• Quick 8 Series design — purpose-built for big cubic inch Chevrolet Big Block race engines
• 18-degree solid dome with gas porting — promotes optimal quench and combustion efficiency while reducing ring flutter and blow-by under high-RPM conditions
• Strutted skirt provides enhanced bore stability and ring seal while controlling weight
• N/A and nitrous compatible — engineered to withstand the thermal and mechanical demands of both naturally aspirated and nitrous oxide applications
• Precision-machined ring grooves with calculated groove root diameters and axial widths for maximum ring seal and reduced oil consumption
• Complex valve pocket geometry allows use of oversized valves and high-lift camshafts
• ISO-certified forging facility utilizing advanced materials and feature-aligned grain flow technology

ArmorGlide® Skirt Coating is applied to the piston skirt, providing seizure resistance, reduced friction, and quieter operation. This proprietary coating allows the piston to be fitted tighter within the bore than a non-coated piston — improving ring seal and minimizing piston rock noise.

Sold as an individual replacement piston. Wrist pin S462 included. Rings sold separately (recommended: W77008-4560-5).