I've heard people say don't touch them they're crap and I've heard some people running them for years with no problems. When they first started selling them on ebay about 2 years ago for a reasonable cost, A guy at my local track bought one and put it on a stock bottom end 302 ford. Needless to say he has went through 3 shortblocks and still has the same turbo!!! Car runs 6.30's on a good day and has been 5.80's on boost and nitrous. I figured I'd take my chances for the money.