has anyone cut their cats out of a 05 hemi.. and if so how does it run just when you put some pipe back in?? thinking about doing it tomorrow

 

I have the cat out of my 05 runs well. a nice sound to it and I set off a few car alarms in underground parking structures.

 

so did it run shi**y or anything when you did that or did you alreasy have the programmer and did it throw any codes or anything to make it run bad.. and what about performance wise?? because i was pretty sure that it would sound better and i am about to order some longtubes along with the programmer.. and in about 3 weeks that new comp 273 cam so i think it will be a pretty sweet truck it should pick up alot of power then

 

Ive got an05 with the 4.7 and i cut my cats out. It runs fine. I would make sure that you unplug the O2 sensor after the cat or cats which ever you have. The ones before always read the same. with or without the cat, but you would rather the engine not read the ones after the cat or it may cause some serious damage. It will try to run normally and it cant b/c it will say their is to much gas going through the system and it will try to compensate and it will lean out, then it will say their isn't enough and it will try to dump a lot of gas. And that will keep happening until something bad happens. My friends motor actually locked down b/c of that. Took a while but it happened. Its better for it to read that something just doesn't work than to work and read wrong.... Good luck buddy... Oh yeah it will sound awesome.