Will it bolt up properly to the stock stuff or will I need to have the muffler shop custom weld something to make it fit properly (or use that mesh stuff, forgot what it's called).

I know, I'm retarded. But help me anyway =].

I hope it all bolts up properly...

Yes I Know I should get a high flow cat, and I will... but its something I need to know first =].

Hey, at least I didn't say "Headers". Right?