decided to try out a stock cat back for a little something different. I did cut it open and modify it so it would flow better, but it still sucks and my truck does not like it. Its a slug with this exhaust, I will be putting my slp loudmouths back on tommorow.LOL

Is it a huge difference going back to a stock muffler? compared to your slp

Huge difference. Its like driving a stock truck again, thats how much it choked it down. The longtubes and no cats are still on it too. From a stop to about 10mph, yes there was some gain back in down low tq, but after that its a slug. Who drives slow like that anyway. I may leave it on and take it to the track just to see how bad it hurt it and then pull it off.

your mods are very similar to mine, Guess im choking my truck down pretty bad

I went from a Garrett 67mm at 6psi to a Stock catback..

That shouldn't make a difference. . . . . . . .

I am saving up and going from completely stock to LTs, ORY, and muffler all at once. Hope to pick up a little quickness. It's a pig now with the stock muffler.