I currently have about 4 or 5 small holes in my muffler, and i am going to replace it, but i was wondering how it affects the car. Does the gas mileage decrease? Does accleration slow down? or is it harmful to the car in any way? Anything at all! Also does anyone know a good muffler and exause to buy to mainly increase performance a little, not so much for sound. I drive a 1997 jeep grand cherokee laredo. Thanks
-Jon
-Jon