Originally Posted by 2thousand5.4

I chopped out my rear cats 3 or 4 months ago. Before I had all 4 cats and then a single magnapack with a single exit in the stock position. It was loud when you accelerated but the Boise was almost non existant at almost any cruising speed. Also the idle was louder than stock but not as loud as I would have liked. After the rear cat chop the idle sounds perfect and you can hear a little rumble when you are cruising. It still don't have any annoying drone I don't get headaches or anything like that from it. The noise is easily cancled out with by the radio and with the radio off you can still have a conversation In the cab and not have to raise you voice. Now under acceleration it's pretty loud, it will turn heads sometimes. But it's still not obnoxiously loud. Now when you go full throttle it will ring you ears a little but that's expected. I also Deleated my rear o2s when I deleted the rear cats. I had MPT turn off the rear o2s so I have no CEL Heres an in cab video for you, alot of the noise in the video is caused by my tires and the wind but it gives you an idea of what it's like. I can get a start up and out of cab video if you like Magnapack and rear cat delete - 2000 f150 - YouTube

Originally Posted by 99SportXLT

Looks like when I get my magnapack, I'll be chopping off the rear cats.

Originally Posted by 2thousand5.4

haha i love how it sounds. I didn't get a chance to do an out of cab video today but I'll get one eventually

Originally Posted by A7X

When I bought my truck 5.4 (stock exhaust) I could sneak up on Horton the elephant... Thing was silent... I immediately deleted the muffler and welded in pipe in its place... Sounded good, my girls father did the same on his wife's expy 5.4 which also sounds good... Years later (two years ago) I deleted the rear cats, Holy hell it was loud, just front cats and straight out the back... It was ridiculously loud and I needed a muffler bad but the shop was closed and I was pulled over the very next day and assured the officer that I thoroughly agreed it was obnoxious and told him victory speed shop was closed on the weekends and I just modded the exhaust the day before... He laughed and let me go after giving me crap about the height... He gave me the thumbsup next time I drove by em with a muffler... Sounds good now but I cheaped out on a thrush muffler just to shut it up a bit... I'll throw in something nicer when I feel the need... For now this keeps the cops at bay and sounds good...

Originally Posted by A7X

When I bought my truck 5.4 (stock exhaust) I could sneak up on Horton the elephant....

Originally Posted by 99SportXLT

Quick question about removing my rear cats, would it be cheaper to take off the rear cats and muffler and then driving it to the exhaust shop or just taking out the muffler? And can I sell those cats?