So we did the long tubes and made some extensions but they failed as far as wiring goes. I'm going to go ahead and buy some new o2s anyways because I suspect my passenger o2 is actually bad anyways. I was throwing the usual codes (p0135, p0155, p0145, p0433) and I know its a bad o2 sensor. My question is, I was gonna buy a set of bosch upstream o2s and they are 18.5 inches long. Will these alone be long enough without extensions? It seems like the stockers were realy short and at that length it should hook up fine. Anyone know about this? Just wondered since I have to buy the 02s anyways but didn't wanna biuy extensions too if I don't have to. Thanks.