still looking for insight as to how to cheat an o2 sensor after the cat, i have it spaced further away from the pipe but is still throwing the code. not as early as what it used to, but is still throwing the code. has anyone successfully cheated/simulated their o2 sensor in a obs chevy? if so, then how? i thought maybe if i removed the cat entirely and welded in a straight pipe in its place might help a bit, but im willing to try anything at this point... aside from buying a cat, or a high flow cat, or any combination of anything that tries to help protect the environment.