If you are planning on installing the cp-e DP, make sure the extra O2/EGT plug, they supply is tight. cp-e does not tighten it during their manufacturing process. Mine popped out on the freeway a couple of days ago (feel bad for that guy behind me). I got another one at Stan's Headers and put it on finger tight so I could drive home without exhaust gas coming through the vents, but it popped off to (found it later in the middle of the road). Main point: Tighten it up real tight.