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How much do replacement brake pad cost for those bad boys. Sounds like you would have to sell a your soul for the calipers and give your left nut for the brake pads!
Guys its not about how much power your making when choosing brakes, although power has a lot to do with braking the brakes can only do so much for stopping, its the tires that actually slow the vehicle down. Don't think of these brakes as if they are only good for cutting the distance in stopping at a given speed, these are for hard road racing and auto x in which typical brakes get very hot much quicker and fade very easily.
You wouldn't even need these for AutoX or Road racing! Your rotor is what is important as your heat sink for Road Racing - AutoX doesn't matter at all about brakes!
All these would do is allow you longer periods of time to change brake pads. Yet, I bet a set of brake pads for these would cost $500 per Axile!
im not saying that these are neccessary for the typical auto x, these like spoilsofwar said are mainly just to brag about and for looks. Brake pads are the most important part of stopping distance (as far as braking is concerned, of course tires are the most important but consider just the braking aspect) but as far as brake fade and how long you can continue to hit the brakes hard is where the calipers and rotors come into play, think endurance racing.