[Ron61]

I live in Northern Califoirnia and all of the above answers are correct. I have side pipes and they are noisy but I built my car to race and then got to old. The major drawback I have seen on under car pipes is there were three Cobras and I can't say for sure what make but I think it was Excalibur that burned to the ground. They had under car pipes and catylic convertors and they just set the fiberglass on fire so if you go with under car pipes be sure to put some kind of heat shielding on the bottom of the body the whole length of the pipes for extra safety. I like the sound of side pipes versus under car pipes but I am not taking sides as that like everything else is a personal preference of the person building the car. Enjoy the car and build it to suite you and not everyone else.

Ron61