Mr. Gasket Ultra Seal Exhaust Manifold Gaskets - SB Chevy - Round Port - Exhaust Port Width: 1.63" , Exhaust Port Height: 1.63" , Center Port to Gasket Top: .80" Karting Hubs & Bearings Diameter Neck - Race Only

Diameter Neck - Race Only

Be sure to check out all our products from Airflow Research (AFR) like AFR Stainless Steel Valves

The Pitman arm holes are 11" and 12" center-to-center

75 degrees of adjustment

New or modified fuel lines are required (if replacing existing Holley Dominator 4500 series carburetor - previous bowl machining was 7/8-20

Mr. Gasket Ultra Seal Exhaust Manifold Gaskets - SB Chevy - Round Port - Exhaust Port Width: 1.63" , Exhaust Port Height: 1.63" , Center Port to Gasket Top: .80" Karting Hubs & Bearings Diameter Neck - Race OnlyUltra Seal premium exhaust gaskets have the ability to conform to warped flanges for a tight seal. They have superior tensile strength to resist cracking. The graphite facing withstands heat, and allows easy removal. Fits 1955 99 V8 Small Block Chevy, with Round Ports and aftermarket headers. Vehicle Applications: 1987 1987 Chevrolet V20 1977 1977 Oldsmobile Delta 88 1975 1978 GMC C35 1988 1995 Chevrolet C3500 1987 1988 Chevrolet V30 1978 1980