Chasmanian

First I would like to say hello as I am new here.

My question is this.
I have an 07 NBS GMC Sierra 4X4 5.3.
I now have a welded in Flowmaster muffler in place of the stock.
What I want to do is a true duel from the front back. Two pipes from the front to some type of an x pipe and then exit the rear. With mufflers of coarse. Do you guys thing it will make much of a difference from what i have now?
I also have a programmer and CAI. The truck runs good but have always been a believer of duel exhaust on my older cars, just not sure on the newer rides.

Thanks in advance.

1slowz71

iTrader: (6)

Well (chasmanian) to be honest with you first off i'd say get rid of the programmer and purchse a tune from 1 of our sponsors to the right of the screen, many members are running true duels with good resolts but most everybody ir running them on long tube headers , i dont think it will help you much on the stock exhaust manifolds , but if you were to do some long tubes with true duels you will defenetly like it even if you keep you cats ! and you might want to consider a better muffler that is straight through like a magnaflow , dynomax, borla .ect....... good luck .

Nuclear Endless

iTrader: (4)

^ x2, a Wheatley, blackbear or other tune will be worlds better than your programmer...

Also get longtube headers, and dynomax or magnaflow bullets if your running duals

So LTs, X pipe into prolly 3" exhaust each with a bullet.

That should be what you're thinkin

Also, welcome to PT!