Whats the best way to get 100 hp without Nitro or S/C?

99 SE
Mods in planning.
Audio:
Pioneer DEH-3000 CD player
Mephis coaxles replacing all factory Speakers
2 Orion XTR Pros 15"
2 Orion Xtreme 900s 900w to each 15
1 Orion Xtreme 500.4 powering the Coaxles