Wiseco K0239A7 BBC 396/427/454/502 Forged Piston Kit Dome 34cc 4.320 Bore

The Wiseco K0239A7 is a Professional Series forged piston kit engineered for Chevrolet Big Block (BBC) engines including the 396, 427, 454, and 502 cubic inch families. Featuring a 34cc dome crown, a 4.320-inch bore, and a 1.760-inch compression height, this piston is purpose-built for stock-stroke performance builds requiring a high-quality forged replacement or upgrade over cast OEM pistons.

Key Features:

• 2618 high-strength forged aluminum alloy — engineered, forged, and machined in the USA for superior tensile strength and fatigue resistance
• ArmorGlide® skirt coating — provides seizure resistance, reduces friction, and enables quieter operation
• Vertical gas ports — improve ring seal and combustion efficiency
• Anti-detonation groove and pressure seal grooves — precision ring groove features that extend ring life and improve sealing
• Forced pin oiling — ensures consistent wristpin lubrication under high-load conditions
• .150-inch wall wristpin with Double Spirolox® — included with the kit
• Ring dimensions: 1/16, 1/16, 3/16 — ringset sold separately
• Dome volume: 34cc
• Bore: 4.320 in.
• Compression height (CH): 1.760 in.
• Stroke: 3.766 in.
• Rod length: 6.135 in.
• Standard deck height: 9.800 in.
• Compression ratio at 96cc chamber: ~12.5:1

Wiseco Professional Series pistons are designed and built to withstand heavy to severe duty performance applications, making the K0239A7 an ideal choice for high-compression BBC street/strip and racing builds. Rings must be purchased separately.