ebay kits are dependent on what kind of kit you actually get. the ram horns are absolutely terrible, they WILL break at the welds and are made of very thin metal. the wastegates suck, they leak and allow boost creep. the BOV's suck in the cold weather, they freeze up and get stuck. the turbos are ok, use a oil restrictor and your good. the ebay downpipes are garbage, same metal as the ram horn's and they have terrible ground clearance. do not use the oil lines that comes with the kit, most i see leak at the clamps. eh theres more, but little stuff.

you get what you pay for in the end; 600 kit vs a name brand 2400 kit.