Brake rotors

The holes aid cooling after repeated hard stops. Not really needed for most street driving. I installed them after having heat issues in mountain driving (the automatic doesn't hold the speed down on hills very well). They do work extremely well on the track — on a track day at Willow Springs I had no issues despite maximum braking from 110mph on every lap. Another consideration was that the slotted cross drilled rotors I bought were American made. At the time is was very hard to get decent replacement rotors for the Kelsey-Hays brakes — there were many complaints about "Chinese junk". But what they won't do is reduce stopping distance — that is really down to the tires, assuming your brakes work at all (even 9" drums will lock up the wheels).