Trying to find out how big they are and how well they work. Do you have to get a wide band o2 to read air fuel, if so could you tell it do turn off the stock rear o2s (to eliminate MIL) and put the wide band in their locations?
I have a Livewire. it's approx: 7" x 3.5" x 1.5". you do need a wideband 02 to measure a/f ratio. you can turn off the rear 02's with it. you DO NOT want to put the wideband 02 in the rear 02 bung. you want to place the wideband as close to the header as you can for the most accurate reading.