I have a 03 truck and put a 4" straight pipe on it and at first the whistle sounded cool and all but now it's getting a little annoying exspecially with my windows down. I was wondering if I went with a 5" straight pipe if the whistle would just be louder or if the exhaust would grumble more over it. On my 04 I had a 5" exhaust and it was throaty and more of a growl and I'd rather hear the growl over the whistle if that makes sense?