You'd be lucky to hit 500hp on pump and the car would be pretty laggy. Why not jus run RBs and keep your low end torque. You'd have to run meth to keep 500hp but the car would be much less laggy with much more tq and much more fun to drive.
99 Eclipse GSX 600HP Sold
03 EVO 8 600HP Sold
09 e92 335i 440hp Sold
11 335is DCT, collecting parts......