Ultra-Seal Intake Manifold Gaskets – 1965-1990 Chevrolet 396-454 Big Block Oval Port

Intake gaskets for Mark IV big block Chevrolet engines using Oval Port cylinder heads, built from a cellulose/nitrile composite that maintains sealing strength under heat and torque cycles. Includes molded manifold end seals and a distributor gasket. Suitable for original-equipment replacement as well as high-performance street, drag race, and oval-track engines. Note: This version is manufactured without silicone beading.