FYI, when purchasing a set of headers check for a good seal. I purchased a set of Hedman Headers and thought I would check the sealing surface before installing them, this is on a new engine. Well it was a good thing I checked them before the engine was installed. The imprint the header made on the gasket was not very good, so I spent about 3 hours trueing up the surface and after trueing up the surface I purchased fel-pro header gaskets which are a litle thicker. Now the inprint shows a good seal all around.