No need to upgrade the diffs, axles eventually if I'm drag racing and I'll definitely need a larger turbo. Much larger, but not anytime soon. And I'll need to relocate said turbo (rotated turbo kit) in order for the housings to clear. This one guy though, cranked out 600+whp with his turbo remaining exactly wherte mine is now, which has little room to go much bigger. He used an FP Black, haven't looked into its specs but it can easily be googled.
Waiting until everyone wastes their money so I can see what works and what doesn't and go for a perfect build.