make sure to hook up those water lines! i didnt on my first turbo and i blew it all to hell! now i learned and this turbo has lasted through 3 headgaskets ( 4 months untuned, what should i expect? lol ). you can drive with no exhaust AT ALL, but DONT get into boost or it could ( this is what i've heard ) f**k up your turbo. make a downpipe for now, get it tuned, then get the rest of the exhaust as money comes to you. i went through local exhaust shops to make mine, f**k all this tsudo cat-back or whatever exhaust companies there are. i paid 180$ from turbo to the back of my car for 2.5'' piping (excluding cat and muffler).