This is the place to ask questions about your engine components like cams, valves, pistons… just anything that is generally "engine" specific. This also includes questions about exhaust systems such as exhaust manifolds, piping size, mufflers, ect...
I think I'm running just the inside cover. My outside one was hacked up to make room for my adjustable cam gear. After it was taken off a second time it kinda fell apart.