Seriously, do you have a stock head or is it port and polished cause from what I hear the stock zetec heads flow like crap and a good P&P job will do wonders for flow.

So if you're gonna change the head gasket that'd be the time to do it. Also if the head is milled to raise compression, watch out with the nitrous. Make sure you have something to pull timing or it go boom.

But if the head is P&P and with those mods you could have an easy 140-150whp without nitrous.

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