The car started making a godawful whirring/raspy noise from under the hood, and lo and behold, it had sprung a leak between the manifold and turbo. So, I tightened the bolts a bit and it got better, but not completely cured. If I let the engine idle and put my face over the turbo I can smell a little exhaust.

I've seen a few people just discard the Greddy gaskets. I'm running 'em. Should I toss them too?

 

If the surfaces are flat, you could probably run without them. First I would check to make sure that there is nothing actually springing the surfaces apart. You should be able to screw everything together finger tight and have your surfaces mate.

 

You've more than likely blown one of the gaskets and have now found why people don't use them

 

Looks like I'll be pulling 'em, maybe this afternoon.

Might as well, it'd give me an excuse to replace the hardware.