how to get more horsepower???

[Hellz]

so, without going through a motor swap, what would be the best method to get more HP from a '03 LQ4 motor thats stock in the H2?

i have heard of doing the L92 heads, and cam swap to get in the ballpark of 500+ HP.
will the stock tranny and T-case hold up to this power?


anyways, tell me what you guys think. i think i would like to shoot for the 500HP area.