A little stir crazy with this foot surgery so thought I'd show my thru valance exhaust journey. Interior frame ring has 3 centering screws to center and capture the exhaust tip. Duplicating the valance curve for the test bunk was easy and used some on line soft ware to print the elongated hole template. My mistake was, I was too cavalier about the bunks' actual relationship to parallel/ car. Ultimately the holes were too big. The repair piece work was intense but Im happy with how it finished.
