How much can the stock fuel system and intercooler handle before its time to upgrade? IE: fuel pump and injectors and the stock front mount/piping.

 

I don't remember the exact figures, but upgrading to anything larger than the stock turbo, you'll need injectors and FP upgrade.

 

The stock fuel injectors can handle anything you do with the stock turbo on pump gas, but the fuel pump will need to be upgraded once you go beyond the basic bolt-ons. I had to upgrade my pump once I installed my ported manifolds & throttle body. My injectors were fine until I upgraded the turbo.

The stock intercooler & piping is fine for the stock turbo, but if you're trying to maximize your setup it's worth upgrading at anytime. I did my FMIC & UICP with the stock turbo, and then my LICP once I upgraded the turbo.