| 1) It's worth the money if you have access to the maps. 2) The WB sensors are heated. Therefore you can't wire them with a toggle switch like with the NB sensors. The carbon will ruin the unheated WB sensors. If want a duel WB O2 system, get one with two heat circuits. 3) Yes, you'd be better off just getting an AFC and hit the dyno considering the modification you have on the car.
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