I have about $1700 in parts for 4 - 13" 7k rotors/calipers, Carlisle actuator, lines, misc. hardware, brgs and seals. I got the stuff from various venders ... whoever had the best delivered prices. I got the lines and fittings from napa and a local Parker Store. I DIY cuz I'm so fussy and I know how and have the tools to do all of it. I opened the underbelly and ran all the wiring like it was built that way in the first place. I also had to move 2 of the shocks inward about 3/4" to clear the calipers. No shop would have gone to those extents. Really, the only special tools required was double flaring tools and a bender. If you get them you can do a MUCH nicer, custom fit job and eliminate all the flex hoses except a short hose to each caliper. Craig