I live in Ohio where we need to E-Check our cars. I blew out my O2 sensors when I changed back to a factory exhaust from my AA. These things are expensive! wondering if anyone took them off since we really do not need them except for E-Check in Ohio. I only need them to pass my e-check and I'm good til 2005. By that time my car will be torn apart running with you all. Please email me or call 216-373-2850. 1997 E36.