What clutch are you using?
Its not bad a bit stiffer then stage 3, but it grabs like a ****. Its one of my "anti-theft" devices according to my friends who have drove my car.
But then again, I have the mccloud master and a 145 Slave pedal pressure is slightly stiffer than stock , i thought i burst a hydraulic hose when i put mine in after taking the ram clutch out.
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that will give you the correct pressure and grip for that kind of power to the pavement.
I would go with a SPEC setup too though in all honesty I like the 2 I have but can't wait to get my 3 in. Intent for my car is 550 hp n/a. 
