I noticed in that Siphon magazine, the first featured xB has four wheel Wilwood discs. Is this an available kit, if not how can it be done and for what cost? Im also curious to know if the e-brake and ABS still function. While it may be a long way off, I would love to do a four wheel disc conversion, and most info I've found on here has been kinda wack so far.

 

they were a custom set ....
i think there are a few out there...

 

theres a guy on here with the rear conversion from wilwood, his username is trebor, so i would shoot him a PM and see what he says

 

You can also contact Chris at CNC motorsports here in Claremont California. He quotes that he can get the 4 piston BBK kit for under $700