GumboSlice

I asked this question once before and didnt get much help, has anyone ever switched from si/do to true dual straight pipes? i have all 4 cats still on with single in dual out stright pipes and looking into changing it to true duals but my question is will it change the sound much?
My si/do stright pipes are kinda loud but not very deep, im hoping that changing it to true duals might make it a little deeper and louder. I did find 1 video of a f150 with all 4 cats into true duals and it sounded good and alot different than mine but than again things do sound different on video so it would be much appreciated if someone could help.

jcavers

Your best bet for true duals to get a deeper tone is get rid of your cats with 2 good mufflers

GumboSlice

That was my plan but still have 2 years of emissions so i cant touch the cats till then.

Auburnfan400

I swapped out my si/do setup to true dual straights after the cats a couple years back and I love it. Definately an increase in sound, nice rumble but still able to keep it relatively quiet when I need to. Which you can't do once you start taking off cats

GumboSlice

Thanks i think im going to go for it than, im going to just cut the y pipe after the cats and run 2 pipes from the cats to the tail pipes, did you use a x or h pipe?

Auburnfan400

Neither, it's just true straights all the way back. If your not doing any additional performance upgrades all those x and h pipes are a waste of money imo

GumboSlice

ya i was just making sure, i didnt plan on getting one anyways i just dont want it to sound like crap.

Auburnfan400

I think you'll be happy with the sound, I know I am

Marine_wolf2003

I had a 97 lariat with the 4.6 and true duals that was loud as hell and a good loud not the annoying that doesnt sound right loud. It did have all the cats on it. I now have a 2000 5.4 sport 4x4 that has single into duals that sounds good just not as loud as the 97 by a long shot.