I am adding true dual exhaust and am wondering if I need a gasket where the heat riser valve meets the stock exhaust manifold. I have replaced the valve with a spacer and it looks like the old valve was just a metal to metal fit with the manifold. I also know the earlier year cars, up through 74, used a gasket on that side but I think the following years were a metal to metal fit. I know the underside uses a doughnut but I'm wondering about the manifold side since I am using just a spacer. Thoughts anyone?
Corvette is a registered trademark of the General Motors Corporation(GM) &
Chevrolet Motor Division. Vette Registries, LLC is responsible for all site content (except for member submitted content or where otherwise
noted) and does not claim or imply that Chevrolet or
GM is responsible for Official C3 Vette Registry content. Vette Registries, LLC is independent from GM and is not affiliated
with, sponsored or supported by GM. Copyright/trademark/sales mark
infringements are not intended, or implied and are in fact used to support
GM, Chevrolet and Corvette.
Official C3 Vette Registry content is Copyright 2001-2017, Vette Registries, LLC. Content may not be reused without written consent. All Rights Reserved. NS
Corvette (Vette) Model Years on this site: 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982