Not a kit, just a bunch of parts I put togeter years ago. (when I worked at Wilwood)
This was the biggest package that could fit inside the 15" SPF wheel
12.75x1.25 rotor with a narrow front superlite 6R caliper
I will warn you, If youre looking for better braking power, this alone will not get you there. The real issue is the pedal ratio/ master cylinder size/ booster.
Im on my third m/c - pedal itteration. currently working on a underfloor mounted, hydroboost actuated dual m/c rig with a balance bar