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MapTun states there good up to right around 400 crank hp which makes sense cause if your gonna go any higher it probably wouldn't hurt to have fresh forged internals replacing the old forged internals. As for the turbo's; there usually at the smallest the GT30 ball bearing turbos.
So to answer your question. Good idea to put in fresh forged rods and pistons since your going beyond 400 hp. Turbo size you'll gonna need GT30R or bigger, don't know what the GT30R can support for max hp.
Nahum Cook
Sigma Pi till I die.
posted by 199.8.17...
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