thats wierd dude what idiots lol!!!!! and they call them selves mechanics shiiiiittt!!! but guys i dont know wat the rattling noise is either but im thinking its just the film in my cat converter that is doing the rattling cause it mostly does it when the car is warmed up and when i accelerate and its pissing me off so im thinking of going to a exhaust shop or somehting so i could get a straight pipe welded on or something lol!!!!! do you guys think that they will do it???