After reading the responses I received about losing low end. I did some self tests. I drove around with straight pipes then I put my factory muffler back on. I didn't realize it , but I actually felt more low end with the muffler on. So with this and the advice I received, I bought an 18" glasspack and put it on. I got the sound and my power back. Thanks for all the advice.

 

Well, as long as you are happy with it, that is all that really matters.

 

I would have run cut-outs instead. You get the noise, you can put it after the cat so u dont lose pressure and when it gets too noisy, you push the button and they close. Glasspacks are awesome, but I do too much driving to be able to tolerate the noise. If they made an exhaust silencer for 8 cyls then i would buy it, but as for right now, all i can find are ones for 4 and 6 cyls. These silencers contain vent holes and a fan that slow air down and the vent holes allow excess air to dump so it doesnt limit flow but it makes them a hell of a lot more quiet. If 5Zigen or another import company made them, i might get it. I dont like doing that, putting import parts of an american V8 but i want an awesome exhaust for my truck without it irritating the crap out of me. I want my ears to last me to hear my kids and listen to my wife...unless she's yelling, then i'll run out the door keys in hand. LoL. It'll be awesome but first i have to find one.

 

here's what nos4fuel is talking about. http://www.pfyc.com/store/merchant.m...ory_Code=GPEXH

 

As for the engine light coming on, it was not an instant thing.. it actually took quite a while for it to register, and I've had it in to make sure that something else is not coinsidentally putting up codes and I'm assuming it's the exhaust. And No, that's not the case. For the backpressure issue, yes there is a loss of low end torque, but I knew this before doing it and have talked to several people about the issue. Got a trick from guy who is actually a mechanic on a pulling tractor, like you see at county fairs and such. He suggested makin a cut into the pipe real near the end of it, cutting perpendicular to the pipe. Buy yourself a washer approx 1" in diameter and put it into the pipe through that slot, weld it in place so that it's obstructing some amount of airflow, and presto.. you've created some backpressure. I am not naurotic enough to compare actual torque numbers (nor do I have access to a dyno!) with and without this redneck engineered quick fix, but it made a noticable difference for me, so that's what I've done.