My Truck is a 99' with a 4.6. My current setup is BBK Shorty Headers and a single Cherry Bomb glasspack with stock piping. I also have a Airaid CAI. I am wanting to go with something louder probably duals and have been thinking about dual straight pipe with hi-flow cats ran straight out the back but i do quite a bit of towing so not sure about that. Any suggestions on what kind of a setup I should do?

 

just to the true duals with the tips at 45

 

straight piped?

 

no on straight pipe. go duals with high flows and run either dynomax bullets or SLP LM1s. 45 out the rear. replace all 4 cats with 2 magnaflow 94106 high flows. thats pretty much as loud as you can get, without asking for a noise violation.

 

what would be louder between the loudmouths and the bullets?

 

personally i like the sound of the f150s straight piped

if i had to go with a muffler either bullet or flowmaster 10 series

check out this guys vids, he has one of it straight piped and with 10 series

http://www.youtube.com/user/f150man55

 

same volume, different tone. bullets are deep and aggressive, SLPs are raspy and hollow(ish) sounding

 

how raspy are the slp's? I think i might go with them but cannot find them for sale anywhere.

 

go with the bullets. im very impressed with how it sounds on my 4.2

not gonna jack this thread but what issues will i run into if i remove my cats. advantages or disadvantages to pipe over high flow

 

http://www.jegs.com/i/SLP/847/31067/10002/-1?CT=999
or buy as a pair and save 50 bucks
http://www.americanmuscle.com/slp-lo...esonators.html

https://www.f150online.com/forums/ex...aust-vids.html

i cant find a 2.25" LM1, which would be better than 2.5"

 

I am torn. Can't decide now.

 

well i think i am going to go with the slp's after FX4's videos and this one i found on youtube.
http://www.youtube.com/profile?user=...20/o_geM3_IUtQ

 

good choice

 

i'ld do slp's and the high flows.

 

Bullets will sound good. Straights actually sound really good too
http://www.youtube.com/watch?v=97DqOfVqqFE

pipe as in no cats? will perform in high end much better, not so much low end, will sound good. hi-flows will sound pretty good, more aggressive and a little less V6 ricey sounding, and legal.