i ran 2 1/2" straight pipes(with h-pipe) off headers with a set of dynamax silencer tips(you could see straight through them)on an '85 camaro with a 350ci once. it was loud, but not too loud and had a nice tone. i was stopped at a dwi checkpoint and two cops told me "sounds nice". then i was pulled over for accelerating too quickly and the cop said "i'm glad you pulled over, from the sound of your car you would have been hard to catch". never was the legality of my exhaust questioned. btw, i don't have emitions testing here.are straight pipes even legal?