I can suggest you NOT run the exhaust out in front of the rear tires if you plan on driving it much. I made that mistake on my 39. Even with thrush turbo mufflers it was loud enough you couldn't talk at a normal voice with the person sitting next to you. Sad part was sitting at idle while standing outside the car, you couldn't hardly even hear the thing running. I know I'm getting old, but even my son comented about the exhaust. Gene