Pontiac 455 Forged Crank 4.250 Stroke

The Pontiac 455 Forged Crank 4.250 Stroke by SCAT ENTERPRISES is engineered for builders and enthusiasts committed to high-performance big-block engine builds. This forged crank serves as the backbone of any serious 455 cubic-inch Pontiac stroker project, delivering the stroke length needed to unlock increased displacement and torque output. Whether you're building a muscle car restomod, a street/strip dual-purpose engine, or a full competition powerplant, this crank provides the precision foundation required to handle aggressive fuel mapping and boost scenarios.

Forged from premium steel rather than cast iron, this crank exhibits superior strength-to-weight characteristics and exceptional fatigue resistance under sustained high-RPM operation. The 4.250-inch stroke dimension is the critical specification that determines piston travel and bore/stroke ratio; combined with a compatible bore size, it enables the displacement jump beyond stock 400 or 430 Pontiac configurations. SCAT's engineering ensures proper journal sizing, counterweight balance, and surface finish to minimize friction and vibration. The 81-pound weight reflects the robust construction necessary to withstand the loads imposed by high-compression pistons and forced induction systems without flexing or cracking.

This crank is ideal for Pontiac 455 engine enthusiasts planning displacement increases or maximum torque output in street, strip, or road-course applications. Installation requires compatible pistons (with appropriate compression height), connecting rods rated for your power target, and proper balancing to the complete rotating assembly. Verify rod length and piston pin offset when selecting reciprocating components to ensure optimal geometry and clearance. Experienced engine builders and machine shops familiar with Pontiac big-block architecture will find this crank straightforward to integrate into existing or new engine blocks, provided all supporting components meet the performance specifications of your build.