I am running a exhaust straight back from the cats to the 5"x16" tips, no muffler, and i was wondering what would it sound like if i put high flow cats on.

 

I think one would have to say louder.

 

straight up sound like a beast. do a youtube search for f150 straight pipe high flo cats and ull be able to hear wat itll sound like. consider putting a muffler (even a small 12") on if your gonna do high flow cats. u need the back pressure.

 

do u have true duals or si/do straights right now?..

 

I have no cats and a single chamber exuast and its way to loud but when I had cats I had no muffler and It wasnt that much louder but It would sound really good ethr way but Not that much louder. It will prob have a deeper sound.

 

will having an x pipe installed make the truck louder?

 

If you could, ask Darren how, but maybe remove your cats and just run the pre cats.

Actually will quiet it down a little bit, but will reduce scavenging and give you back some low end torque.

 

Loud and obnoxious with no Tone.

 

listen to this. its a 5.4 TRUE dual straights with high flows. idk if u have true duals or si/do straights.

http://www.youtube.com/watch?v=WXqE-KU0AN4

 

x2, Thats the only way to describe it.

 

Depends, if you're a redneck it's amazing.

 

yep. thats y i dont like magnaflow and i dont like x pipes. im sure theyre good stuff but theyre too quiet for me.

unless its true dual straights, then an x pipe makes it sounds amazing.