Only if you want to tune your cams for the best power. However, removing the VCT will trip a cell and you'll need a chip to fix it or the car will run bad. It's not worth doing if it's you're sole upgrade, but if you're going to get a chip, especially one done on a dyno, it would be a good mod to get the best gains so you can tune the cams as well.

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