Chevy Intake Gasket - 262-400 1955-91 1/16" Thick Stock Port 1. 25w x 2. 00h. Manufactured from cellulose/nitrile composition gasket material. Provides excellent sealing and durability. Silicone beading on both sides of each gasket. Gasket sealer not required for installation. Complete with manifold end rail seals and distributor gasket. For OE replacement, high performance street, drag race and oval track.Pit Stop USA offers Mr. Gasket Ultra Seal Intake Manifold Gaskets - SB Chevy - Stock Port - Intake Port Width: 1.25" , Intake Port Height: 2.00" , Center Port to Gasket Top: .81" 5820 at low everyday prices. Be sure to check out all of our products from Mr. Gasket including Mr. Gasket Intake Manifold Gaskets - Small Block Chevy.