check out :
www.hydrogenreactors.com
they state their NEW LINX will do the trick needed for the 4 wire wideband sensors/afr's
have ordered a HR1 system w/2 extra Blox for the toy 00' 3.4L v6 w/afr and will attempt to double MPG.
have had numerous correspondence w/staff there and will post results as soon as I can get time to install after I get it
said it will be a week or so cause they are in houston and the storm has set them back a bit on production numbers. I have researched hho now 1 yr. ..these guys seem to be the best and very reasonable for all you get w/HR1
let me hear from anyone having sucess and I will reciprocate!! cheers all!!