I'll chime in since I just finished a budget T3 build. The minimum you are going to need to see any significant gains will be; manifold, turbo, oil lines, intercooler, downpipe, intake, injectors, wideband gauge and a tune. You should be able to find all of this for under 3k if you are resourceful. With a t3 you probably won't have to replace rods since the boost onset is so gradual. I've been running a .63 T3/T04e at 24psi on stock rods/ fuel pump for over a year now without issues. I might throw an inline fuel pump on this summer just to be safe but Ive been driving the car hard with stock fuel pump, rods and clutch and have yet to run into any issues. My MPG actually improved due to the later boost onset.
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