2 1/4 exhaust slant 6

With 2 1/4" pipe by the time you add a few bends (non mandrel bends) it's squeezed down to about 2", as long as the pipe isn't crushed on the bends it is about the right size for a slant 6. Mandrel bent exhaust is overkill for a slant 6. Anything is an improvement over the stock pee-shooter exhaust that is usually found on a slant 6.