[Luke243]

My buddy told me I dont need o2 censors if i were to get a set of high flow cats...is he totally wrong or is he right? I am looking to get a set of magnaflow high flows, could somebody also tell me what size inlet/outlet i need?

 

[Zlow28]

you will need your upstream o2 sensors, as for the downstream ones, theyre not necessary but they will throw a code unless you get it tuned out.