i have an 01 with a strait exhaust, superchips programmer, and edge drag comp. I was given a full 5 inch exhaust and was goin to put it on my truck. i have heard that unless your making huge horse power numbers that a4-inch is plenty, and that a 5 inch could actually hurt horsepower. I just dont wanna put it on my truck if its gonna hurt the way it runs. Anybody Know for sure?