Black ceramic coating provides an aggressive look to your engine compartment. Black ceramic is heat and corrosion resistant for long life and durability. Provides an easy to clean finish. High Rise/Dual Plane Design. Square Bore Carburetor Flange. Exhaust Crossover for Improved Street Drivability (Standard Small Block Chevy Heads). Height: Front 4.19″, Rear 5.27″. Port Size: 1.92″ height, 1.16″ width.