well i thought would be fine with leaving my cats in. but low and behold about 3 weeks later I cut out the back two. And i love it. I had done this before on my old 97 4.6. I just didn't want to be quite that loud again.(old setup was pre cats no mufflers SI-DO pipe to 3.5in tips)It's not as loud and not as poppy with the new exhaust on my now 2003 5.4 (true dual precats, pypes M-80's with x-pipe and 3.5in tips) videos are not the best but whatev!

with all 4 cats


just pre cats

 

i really want to this on my 97 4.6
but idk how and i want to take it to a muffler shop..
will they do it?

 

there is a definate difference... nice setup, thanks for the post...

 

Any cel after taking off cats?

 

No.

 

no not on this truck or my old truck

 

It depends on where you go. Some will do it and some wont.