those turbos arent bad at all. i had one on my last setup and i beat the crap out of it and drove it daily summer and winter and never had a problem. sold it to someone on hondatech and he makes 280whp with it. though, i would never buy a used turbo unless i intended on having it sent out to be balanced and professionally checked. that intercoolr should be aluminum, i dont know of any intercooler that isnt. it looks liek its from a saab, but i could be wrong.