I do have a question on how Subaru sensors are located. As in, which is sensor location coded?! Which is front o2, rear 02 and last 02? I have the p0420 code and am replacing the o2s, headers and car (due to rusted flange).
Edit: what confuses me in monster...I thought the downstream would be b1s2, being its down stream. Correct? Or is subaru flipped?
Last edited by Kiyo1990; 02-06-2013 at 09:19 PM..