Sleeperz's right, not even worth it.

There's a Zetec Cougar guy on our forums with stage 2 intake cam with adjustible gear, race header, exhaust, and intake doing 136whp & 140tq, which is just 10hp shy of stock SVTF numbers but he's got more TQ. His engine is stock otherwise, but with a better clutch, but that won't make more hp on the dyno. I bet you he didn't spend much more than $1000 on the engine mods.

2000 Rio Red I4 Cougar 200whp & 210wtq at 9psi 254whp & 276wtq with NX 35shot WRX TD04 Turbo, Cut Short Shifter, Strut Tower Bar, 17" ZN Wheels, Roush Springs, Starion Intercooler, NX 35 shot, HKS SS BOV, Full 3" exhaust,StreetFlight Chip