no mufflers

I had straights on my stang and i loved it. It didnt rattle any of my interior at all. All i did was go to a muffler shop and tell him to remove mufflers and put pipe instead and run 3'' tips out the back. i think it sounded good, but not as good as a catback like bassani or one of them. Its cheap and loud
 
Some like it, some don't. At high RPM/racing RPM's it sounds like an all out drag car. If you lug your motor at all though or drive lower RPM's it will sound like an F-150 truck...
 
I ran my car for a night with just my off road prochamber, no catback. And it was straight up race car, it was soooo loud, and it had a great sound and rumbled the seats because the pipes ended right below. If ca wasn't so anal about everything, i'd run it straight midpipe all the time!! :nice: I dont know if that sound would carry through the pipes all the way back to the end of the car, (with no muffs) or if it would quiet it down at all, I think it would, but i'm not sure.
 
I started my car with just the x pipe no cats and no catback hooked up. That was brain rattling loud, I didnt even take it out of my driveway, lol. I revved it and got pissed cause it sounded about 10x more powerful than it is.
 
My '00 Vert is running a stock system with the mufflers removed. I really like it and I have had no legal problems. It is a bit loud at times like hard acceleration but we really are pleased. My '66 is running side exit pipes with the old style glass packs. As you see, I like the sounds.
 
My truck is running straights that doesnt have an h pipe or anything in it. I had the exhaust guy run them seperate off of the last set of cats(for some reason i have 6) and i prefer being really loud. Mines not rediciously loud or anything, guess i could take a clip. It probably wouldnt help you being a big ass truck with a 5.4 though. I loved the sound of my stang with straights, but it didnt sound to good if you reved and let it come back down fast, popped everynow and then. It was the cheapest thing i did to my car, only cost $90 including chrome tips.
 
I would imagine that aside from the sound change, you are also going to lose backpressure which will be detrimental to your performance.

I dont know, if you think about it bumping up to a 2.5" catless exhaust system would probaly have less backpressure than the stock 2.25" with 4 cats (or 6 if your NPI) and no mufflers.

Good question though. Mine didnt really feel like a slouch or anything without them, but the X pipe made it run pretty nice up top.

Who knows...:shrug: