Speedmaster PCE305.1128 Chevy SBC 383 Forged Flat-Top Pistons 6.0" Stroke

The Speedmaster PCE305.1128 is a set of forged flat-top pistons engineered for Chevy small-block (SBC) 383 cubic inch engine builds. These pistons feature a 6.0-inch stroke with a 4.020-inch bore diameter, 1.100-inch compression height, and 0.927-inch pin diameter, delivering robust construction for high-performance street and racing applications. The 2.5mm ring grooves accommodate standard piston ring packages, while the flat-top design provides reliable combustion chamber geometry for tuned power delivery.

Built from forged material for superior strength and heat resistance, these pistons are designed to withstand the demands of modified small-block engines. The precision dimensions and proven SBC 383 specifications make them a direct fit for engine rebuilds, custom stroker builds, and performance upgrades. Whether you're assembling a street engine or a competition-grade powerplant, these forged pistons deliver the durability and performance expected in professional engine work.

Key Features & Benefits

• Forged Construction: Heavy-duty forged pistons provide superior strength and thermal stability for demanding engine builds.
• SBC 383 Specifications: Purpose-built dimensions of 6.0" stroke and 4.020" bore ensure precise fitment for 383 cubic inch applications.
• Flat-Top Design: Flat-top crown maintains consistent combustion chamber geometry for reliable power delivery across RPM ranges.
• 2.5mm Ring Grooves: Standard ring groove configuration accommodates conventional piston ring packages without modification.
• Premium Material: Forged construction resists detonation, thermal stress, and mechanical fatigue common in high-output engines.

Specifications

Ideal Applications

• Chevy SBC 383 stroker engine builds and rebuilds
• High-performance street engine assembly and modification
• Racing and competition engine development
• Custom small-block engine upgrades and restoration