i bought a brand new greddy type s knock off from ebay. works great, doesnt leak, and looks/sounds exactly the same. only difference is this one was $38 shipped to my door and came with polished allen key bolts, gasket, metal t-fitting, and vacuum hose. I wouldnt skimp on anything besides that tho as if it fails it doesnt hurt anything. I tested it on the dyno by holding my hand over it on full load and no leaks at all