Basically,
Standard Clutch ---> Sports Clutch ---> Racing Clutch.
The racing clutch, my advice is not to use it for daily driving.
The design is not for half-clutch. Not a good idea if you need to
stop half way on a slope frequently.
Just upgrade to a heavy duty one, usually we call it Sports
Clutch.
It can withstand more abuse and will not slip easily compare to a
Standard Clutch after some spirited driving.
So the available power can be transfered more effectively.
About less than $1.2K (depends you need the clutch cover etc).