Cometic Gasket CG-C9635 Top End Gasket Kit for Evolution Big Twin 92-99Description for Cometic Gaskets EST Top End Gasket Kit Features include the race style exhaust gasket, that won't fray into the port, and the one piece Evolution rocker box base gasket which is made from a single layer of . 020" thick embossed Viton coated steel Top end kit EST kits are made for any builder who demands the best and appreciates the long term value for his her dollar Product Specs for Cometic Gaskets EST Top End Gasket Kit Manufacturer