I recently put in a true dual 3 inch exhaust with headman headers and spin-techs going out the side. After I did that, my computer gave me a lean code from the o2 sensor. Its a four wire heated sensor and I relocated it to were the four pipes meet at the collector. There is no way to mount it farther back. I believe the problem is that its not getting hot enough to get the correct reading. Any suggestions. Oh and by the way, this is a new O2. Thanks.