Wilwood 12" Brake Part Numbers

[Sgt.Gator]

Because I bought my 818R used, I didn't have the original Wilwood boxes, instructions, part numbers. After spending hours trying to figure out exactly the Wilwood part numbers for the optional 4 pot 12" brake package I finally sorted it out. The issue being that Factory Five has the wrong rotor spec in their parts catalog for the brake rotors; they say it is a 1.25" rotor. And they don't list the actual Wilwood Kit model numbers. If you do searches for a Wilwood rotor in 1.25" width you won't find the right caliper or the right rotor for our setup.
"The enhanced brake capacity and pad performance of the DynaPro 4 piston calipers are combined with 12.00" and 12.19" diameter 1.25" thick rotors to provide excellent braking performance on Factory Five Racing 818 kits."

So I measured my rotors, they are in fact .81" front and rear.

They also have the wrong front pad size, they say it's 7812, Wilwood says it's a 7816. The difference is the thickness, the 7812 are .49" thick, the 7816 are .60" thick.

Which explains why my front brake pads don't seem to last as long as I expect them to!
The pro of that is you can carry the 7812 pads in your track kit and have pads that will fit either end in an emergency replacement at the track. But to maximize life I will run the 7816 when I swap pads in the shop.

See: http://www.factoryfiveparts.com/wilw...ear-brake-kit/

The correct info:
Front Brake Kit – Part No: 140-9193-DR
https://www.wilwood.com/BrakeKits/Br...no=140-9193-DR
12.00" x .81" rotors
Rotor: Left: 160-8497-BK
Rotor Right: 160-8496-BK
Pad Size: 7816

Rear Brake Kit – Part No: 140-7006-DR
https://www.wilwood.com/BrakeKits/Br...no=140-7006-DR
12.19" x .081" rotors
Rotor Left: 160-6925-BK
Rotor Right: 160-6924-BK
Pad Size: 7812

Assembly and Fitment for Front 140-9193-DR:
https://www.wilwood.com/PDF/DataSheets/ds522.pdf

Assembly and Fitment for Rear 140-7006-DR:
https://www.wilwood.com/PDF/DataSheets/ds411.pdf

If you screw up and strip the threads in the adaptor plate for the rear caliper you can either order a new plate from Summit or Jegs, it's part number 250-6982 ($41.62); or you can order the clinch nuts themselves to replace in the adaptor plates, Wilwood 230-0355 ($5.99 also at Summit, Bracket Clinch Nut, 3/8 in.-24, WIL-230-0355). It took me many hours to find out they offer these special clinch nuts as an item. Don't ask me why I needed to know this!