Ooooof, yeah a GT30R (GT3076R) with a T3 inlet flange, 4 bolt 3" outlet, 0.82 AR, however instead of the usual 76mm compressor wheel, I had an 88mm compressor wheel and had the housing machined.
Basically enough air flow for 600 BHP.
I made 453 WHP in a 5th gear pull at 22 psi (99 octane)