Dart Main Stud Kit - Hex Nuts - 4-Bolt Mains - Black Oxide - Small Block Chevy 1130821051 it optimizes fitment and comfort

it optimizes fitment and comfort for various head shapes

GM Fullsize SUV 2000-17

Pontiac: Catalina 67 - 69 7 L Engine

Part throttle performance and distribution are improved by redirecting the flow pattern created by the partially open throttle blades and gradually reducing the velocity of the air/fuel mixture entering the plenum to allow for a smoother transition into each runner

Dart Main Stud Kit - Hex Nuts - 4-Bolt Mains - Black Oxide - Small Block Chevy 1130821051 it optimizes fitment and comfortProduct Description: Main Stud Kit Hex Nuts 4 Bolt Mains Steel Black Oxide Small Block Chevy Since 1981, Dart Machinery has become the acknowledged leader in producing race winning components. Dart Machinery aluminum and cast iron engine blocks are designed to meet the specialized needs of racers and performance enthusiasts. Dart components are developed in house, manufactured on Dartas own CNC machining centers, and tested on Dartas computer