oh hahaha yeah ok.... its just a change in the pitch..... you'll want to retighten those header bolts once a month for the first 6 months, just so you know.... and if you dont exactly like that sound... you can always go with new mufflers.... i know the exhaust shop by my house has a computer program that you can select which headers, pipe style, cats, and mufflers... and it'll give you what kind of exhaust sound you're gonna get... its kinda cool really.... did it with my mustang, played around with it til i got the sound i liked the best and performed the best... and amazingly... sounds just like the computer made it sound