OK, I just tackled the UDP install (now that I got the right one) and gutted my cat while we were doing the work. My question is how soon did you guys get a CEL, the ones that did anyway? I drove around for about 30-40 min and have yet to get one. Can I stop crossing my fingers or should I still be a little wary?

Toney
'97 RS 5 Speed (totaled)
15.4606@88.42 Mph
96 Toyota Celica GT
88 Toyota Supra NA-T (w/ sports package)
Got Boost?? Hell yeah I-6 turbo powah baby!

my cat is fawked. I had a cel for coil and/or wires. I changed my coil and wires and now the cel is still up for bad cat. I haven't changed the cat tho. I had the battery unhooked for about a week while I waited on my powdercoating to be done. The car didn't throw a cel until about an hour or so of driving. I'm tempted to gut the cat tho. The mechanic that diagnosed my car for me (had a code reader thingamabob) said where the coil went, the car was probably only running on 2-3 cylinders at times and the other cylinders were just putting unburned fuel into the cat. So, the cat was soaked in gas, and when the car was running on all 4 again, it burns the fuel and burns up the after-cat o2 sensor. Something like that. Oh well, I figure a high flow or gutted cat will give the same effect.