the removal of the grill is for install and for racing. everyday driving done with the grill in place.
before you buy ANYTHING i would strongley suggest you spend at least a couple weeks searching the forum and learning what you can do to your car. its all here. 50 rwhp inc. is very attainable the limiting factor will be how much do you want to spend? there are cars on here with minimal mods that have 350 rwhp and there are cars on here that crushed 400 rwhp. its all in your pocket book!!