[Mr.Fixit]

It's about 7-8 hours labor to install the 4 corner kit on a SPF. I have done several. Time consumption is bolting the rotors to the hubs, safety wiring all the bolts. Replacing the caliper mounts, calipers, flex lines and fittings, aligning the calipers to the rotors with the shims, more safety wire to hold the caliper bolts in place. If yo run 15's you have gotta shave some metal off the parking calipers to clear the wheels. Then the fluid replacement and bleeding, plus testing and bedding in the brakes so they work right for the customer. Sometimes you ned to re-flare one of the hardlines or some other unexpected hassle. The difference is dramatic, you might just split your lip on the steering wheel the first time you stomp the brakes, after the mechanic beds them in. The factory willwood brake calipers are much smaller than the upgrade calipers, the difference between the rotors is huge. You can improve your track performance by just changing to a harder pad for the track, most guys run softies on the street. keep the fluid fresh, it's cheap and only a little bit of a hassle as you need another person to do it. You can also do some ducting to cool the front rotors for almost free.

The cost is not mostly labor, you are buying: 4 calipers, a set of race pads, 4 rotors, you have to have the rears machined down in diameter a bit, four hats, two billet aluminum front hubs, four new caliper mounting brackets, two parking brake calipers, four new stainless hoses, four AN adapter fittings, new high perf fluid, and a bunch of hardware that is drilled for safety wire. I might have even forgot a part or two.