Speed Warrior™ Intake Manifold non/EGR 262ci-400ci, 1987 and later with cast iron cylinder Heads - non-Vortec, non-LT1. Features: Permanent Mold Casting Port Size: 1.92” height, 1.16" width Height: Front 4.19", Rear 5.27" Power band: 1500-6700 RPM Exhaust Crossover for Improved Street Drivability (Standard Small Block Chevy Heads) Square Bore Carburetor Flange High Rise/Dual Plane Design Precision CNC machining