HOLY F'ing CRAP!!!!

Just got off the phone with one of my brothers friends. He's got a mitsubishi turbo kit, ready for installation, he is a mechanic said it would fit my car. The guy he got it from said it ran like a "stg. 4" (whatever that means). So my bros friend is selling it to me for.....$350 bucks, but then I have to get a manifold built....so two questions..


A: Should I buy it?
B: How much is it to get a manifold built?