DionR said Don't remember the numbers, but I remember they popped the head gasket. Looked for a link, but appears you have to be a member of MTOnDemand. There used to be a turbo /6 Simca that was pushing over 600 hp. And I know there is/was one in Aussie Land that was similar. Here is a supercharged on that is supposed to be making 600 hp: Click to expand...