Upgrade exhaust

[GManiac]

I want to use the 50 series delta flow with 3" inlet and 2.5"dual outlet for the 5.3.  Don"t know if this setup will have enough back pressure for increase in low end torque or the same results like with the stock muffler with the torque kicking in on top end.

[chevy4x4trucks]

I've got the flowmaster american thunder series w/ the 3" inlet and dual 2-1/2" outlets and I didn't experience any backpressure loss.  I say go for it.

[Guest]

American Thunder here and it sounds great. I didn't notice any performance gains/losses.