Originally Posted by ChadGresham
Just don't leave it undone and ride around for an extended period like that. Besides the cops possibly getting after you, people "say" you will burn up valves without full length exhaust.. IF that is true or not......?? good luck with your diagnosis.
Pretty much an old wives tale, look at all the race cars with open headers and exhaust. Used to be people sweated valves warping from cool air reaching the valves, good theory, but not going to happen.