oh yeaaaaahhhhh...heehe...you'll feel it. I have the stage 3 kevlar clutchmasters. You have to break it in for 500 miles on the kevlar before you race it. BUT THE DIFFERENCE: It grips hard and fast and doesn't slip even if you tried! Racing clutches can handle more torque than the stock clutch and can take more abuse...they'll last longer if you race your celica or drive it hard on the street. Since racing clutches don't really slip, they can be tricky to learn how to use, and sometimes funky to use on the street in traffic. Just make sure the car in front of you moves at least 30 feet before you engage your clutch so you don't run him/her over.
It's like an on/off switch: either you're not moving, or BAM you're gone!!!