Do yourself a favor: do NOT buy an eBay turbo kit. $600 to boost your car is not sufficient. These kits are manufactured using shoddy materials, overseas, by companies that don't care about their products or the quality. They WILL fail. I had to run a cheap manifold for a while (clearance issues on my original manifold, needed a new one stat), and after less than a month, the wastegate flange fell off, along with my wastegate. I was in full boost at the time. Absolutely ruined my tune/fuel mileage, and I had to do a valve adjustment (mainly, that was just me being anal with my car lol).
On a friend's turbo Del Sol, his s***ty eBay knockoff wastegate failed, and he'd get boost creep/spike from 10psi to friggin 25psi. After only two days of driving like that, the turbo was spiking to 22-25psi regularly. Eventually, the turbo gave out (after maybe 2 months). Upon inspection, it had coked horribly bad, the main shaft was horribly loose and wobbly, and the housing itself was starting to warp.
TL;DR: They are s***. Don't. Just don't.