Wiseco K426B6 2618 Alloy Forged Piston Set 540 Stroker Pro Series 38cc Dome

Engineered under Wiseco's demanding Pro Series standards, these pistons are designed to handle the extreme cylinder pressures and thermal loads generated in heavy-duty race and high-performance street builds.

Featuring an open chamber dome design with a 38cc dome volume, the K426B6 pistons are optimized for use with open chamber cylinder heads, allowing builders to dial in target compression ratios in 540 and stroker configurations. The pistons are also nitrous compatible, making them an ideal choice for power-adder builds running nitrous oxide injection systems.

Key Features:

• Material: 2618 aluminum alloy forged construction for superior tensile strength and heat resistance
• Dome style: Open chamber dome with 38cc dome volume
• Application: 540 cubic inch and stroker Big Block Chevy engines
• Deck height: Designed for 9.750-inch deck blocks
• Nitrous compatible — suitable for power-adder builds
• Recommended ring set: W860H8-4560-5 (sold separately)
• Rings sold separately

Wiseco's 2618 alloy forging process produces a denser, stronger piston compared to cast alternatives, providing the durability needed for sustained high-RPM and high-boost operation. The K426B6 pistons are designed and machined in the USA to precise tolerances, ensuring consistent fitment and long-term reliability. Rings are not included — order the recommended ring set W860H8-4560-5 separately for a complete assembly.