I'm thinking about removing or gutting my rear cats and lookin for input on what it may sound like I have a 2000 5.4 with a different muffler and turndown before the rear axel and I want it a little louder. Any problems I may have by doing these? Which will sound deeper? Cost to do it? Should I do it? I have tried looking it up but no one seems to have the same set up I do so its hard to compare. Thanks guys

 

I've said it time and again, gutting cats kills velocity. If you want to delete them, replace them with pipe and get a custom tune to delete the rear O2's or use non foulers. It will be louder, deeper depends on the rest of your system.

 

Unless you've had practice with it don't gut the cats. Just completely remove them. Pending ofcourse what your states emissions restrictions are. Like Otto said if you do that your most likely going to need atleast a 02 sensor kit to bypass setting off the code removing the cats will set off. As far as sound i've heard that setup both on 5.4's and 4.6's and by far to me it sounds better on the 4.6. I have no idea why. That being said, the 5.4 I heard didn't have as much lower rumble as just a loud, raspy tone that I personally didn't like. It was loud...but didn't sound good. I'd suggest do a similar setup like I did that gave me plenty volume but kept it at a respectable level and sounded good. Leave all your cats, and have true dual straights back from it with some tips. I hate turn downs haha. Doesn't have a clean a sound to me