Welp..just got back from the shop i have officially had my rear cats out for about 30 minutes and 9 miles. so far i really cant hear or feel much of a difference. i hope it came out right or maybe i had my expectations set to high!? for all those with their cats removed whats to expect?

 

Well since you have Flowmaster its gonna be hard to tell from inside. If you have ever had someone take your truck down the road before, and do it now, you will tell a good diffwerence. I started my truck after we had both rear cats out ( video: http://www.youtube.com/watch?v=mqBxX...e=channel_page

Then I reset the negative battery terminal for a few minutes, and I put 100 miles on it, then got a video, heres my before & afters.

before:
http://www.youtube.com/watch?v=hA4b28XFLH4

after:
http://www.youtube.com/watch?v=f4ptC...e=channel_page

I noticed a hell of a difference, much better. Get a video of your exhaust sometime i'd like to hear it, as would many others would too.

 

darren,
what was the purpose of disconnecting the negative terminal? thanks

 

So the PCM is not monitoring the trucks current status, and on the next start it realizes the change and allows it. My friend said it would probably be a good idea to do it while we were sawzalling and welding anyways.