your the second person to comment on the focus banner, i'll have to admit though, you really have to be on acid to appreciate it. LOL (i'll see if i can slow it down)
as for the clamps, we do provide all the clamps needed for install. basically, we provide the clamps so that you could "technically" install it yourself. (and many people do install it themselves). however, by having a shop install it for you and weld it, you will get a 100% flawless seal, which will keep the exhaust sealed better. this is not to say the clamps will not seal good, but since they are clamps (and have bolts) they may rattle loose within time.
basically, theres pros and cons to welding. pro: you get a perfect seal, con: the exhaust now becomes ONE PIECE and is harder to remove. the clamps are vice-versa.
hope this helps
have a great day guys
josh
www.yodudeperformance.com
Louder than i thought it would be, but it does sound really sweet! (single magnaflow muffler). I've got the stock Ypipe. I'm probably gonna add an aftermarket one later. Still can't decide.