I have been reading about this Gibson exhaust, searching and reading, searching and reading...It sounds like it is about the best available. I have a '00 SE and was wondering if there was any welding that needed to be done to install the Gibson exhaust? I have read plenty about it but only a few have mentioned some welding. Where can I get this Gibson exhaust and how much am I looking at? I am also interested in the K+N filter. I have seen that www.4x4parts.com has a Air intake upgrade kit that replaces the stock airbox and filter. Is this something I should consider, or is just replacing the filter enough? Icedog00