Speedmaster PCE305.1015.04 Chevy SBC 383 ci 6.0" Flat Top Forged Pistons 4.040" Bore

The Speedmaster PCE305.1015.04 is a set of forged pistons engineered for small-block Chevy (SBC) 383 cubic inch engine builds. These flat-top pistons are precision-machined to 4.040" bore diameter with a 6.0" compression height, designed to deliver reliable performance in both stock and modified applications. The forged construction provides superior strength and durability compared to cast alternatives, making them ideal for high-horsepower builds and demanding engine duty.

These pistons feature critical specifications including a 1.100" top ring land dimension and 0.927" skirt diameter, engineered to work with standard SBC 383 engine blocks and compatible rotating assemblies. The flat-top design maximizes combustion chamber efficiency and is commonly used in street, bracket racing, and custom engine applications. Installation requires proper ring gaps, wrist pin fit, and bore preparation to ensure optimal performance and longevity in your engine build.

Key Features & Benefits

• Forged Construction: Premium forged design offers superior strength and durability for high-performance engine builds.
• SBC 383 Displacement: Purpose-built for small-block Chevy 383 cubic inch engine configurations.
• 4.040" Bore Diameter: Precision-machined to exact specifications for proper cylinder wall fit and ring seal.
• Flat-Top Design: Maximizes combustion efficiency and is compatible with standard SBC 383 engine blocks.
• 6.0" Compression Height: Engineered dimension ensures proper piston-to-deck clearance and combustion chamber geometry.

Specifications

Ideal Applications

• Custom SBC 383 street engine builds
• Bracket racing and competition engine applications
• Performance engine rebuilds and rotating assembly upgrades
• High-horsepower small-block Chevy engine projects