im new to these sights and pretty new to the truck era. i used to have a gto and now have a vho so im treadin in new water. anyways i want a catless setup. Im thinkin headers runnin to xpipe and into dual spintech super pro streets. any advice on wat size piping i need for a stock 6.0l LQ9

 

3"

it worked welll for me

 

should sound good. thinking of doing this when i redo mine with duals if i go that route atleast. ive got catless into pro street now and it gets nasty at wot

 

I just finished my tru dual set up, at first it was with out a x or h pipe. It was really raspy and really loud! I'm don't like raspy sounding exhausts and decided to ad an H pipe a foot or two before the spin tech mufflers. It cleaned it up alot! Still loud and really nasty at wot! I have really small spin techs. Not sure which ones, there about a 1'x4"x6" I think there race series?? I paid $80 for both, so I can't complain.

 

well i have 3 inch now but ive heard that you lose bottom end with 3''. so any suggestions between 3" and maybe 2.5"

 

2.75 jk
i have 3 in and it works well, but i have headers and some other mods,, i say if you dont plan on headers and cam, go 2.5

 

I agree with ^^^ you won't stop at exhaust with a vho...trust me...I don't think you'll be happy with 2.5 if your going to cam (and you will) get the 3"