biohazard

ok well everyone at school is raving about these sims, yes i know i could build one but this looks pretty clean, i am also in a emissions class now and can use a scanner, 5gas, o-scope, and emission dyno to load my car so im taking advantage of the next 3 weeks and solving this problem with our exhaust throwing a o2 prob..... i need to know if anyone has used these and if we have a single or dual output

http://webstore.o2simulator.com/inde...ATS&Category=3

im hoping to order mine tonight

i should specify its the 2nd o2 sensor, the one closer to the back of the car and its a 2.2 base model 05

UPDATE: i looked at the site better and realized dual output was if u had more than 1 post cat o2... ill post up before and after numbers and printouts if i can get them