[higgimonster]

it is true that adding an intake and exhaust will lower your lowend (sort of, meaning that you will see more gains in the higher rpm range).
But as far as not being able to rev the engine before 'dropping the clutch', i offer this. Next time you want to do a launch, hold down the brake with your left foot while flooring the throttle. When you are ready to go just slide your left foot off to the side (like you are dropping the clutch) and viola, you are able to get the engine into a much better torque zone then a normal start. BTW, the point at which the engine stops revving while doing this is called your stall point.