Wiseco K0129B3 Small Block Chevy Domed Forged Piston Set 4.030 Bore +13.5cc

The Wiseco K0129B3 is a high-performance forged piston set designed for the Small Block Chevrolet (SBC) platform. Featuring a 4.030-inch bore and a +13.5cc dome, this kit is engineered to significantly raise compression ratios for serious street and race builds. The domed crown design makes these pistons an ideal choice for naturally aspirated high-compression SBC applications requiring maximum cylinder pressure efficiency.

Each piston in this set is engineered, forged, and machined in the USA from 2618 aluminum alloy, delivering superior tensile strength and heat resistance compared to cast or 4032 alloy pistons. The fully machined crown ensures precise combustion chamber geometry and consistent performance across all eight cylinders.

Key Features:

• Bore Size: 4.030 inches
• Dome Volume: +13.5cc raised dome
• Head Design: 23-degree hollow dome configuration
• Wrist Pin Diameter: 0.927 inches
• Material: 2618 forged aluminum alloy for superior strength and durability
• Crown: Fully machined for precise tolerances and optimized combustion
• Skirt Coating: ArmorGlide® coating reduces operating friction, minimizes wear, and allows for quieter operation
• Oiling: Forced pin oiling for sustained wrist pin lubrication
• Ring Grooves: Precision-machined with anti-detonation groove and enhanced ring seal features
• Set Includes: 8 pistons
• Designed and built to withstand heavy to severe-duty performance applications

Wiseco's ArmorGlide® skirt coating provides a seizure-resistant, low-friction surface that extends piston and cylinder wall service life. The +13.5cc dome volume is well-suited for builds targeting elevated compression ratios, particularly when paired with large-chamber cylinder heads. With over 80 years of forging expertise, Wiseco remains a benchmark in high-performance forged piston manufacturing for domestic V8 engines.