Put in on this morning and then took it to a shop to have them weld it on and create a extension pipe for the outlet to the tailpipe since the new muffler was shorter then the OEM. The whole thing including the muffler and welding cost under 60 bucks : )

It sounds good and has a nice rumble to it, I am happy with it. One thing wrong is now I have some good drone when on the highway and at RPMs higher then 1800.

Any suggestions on an easy fix? Also I have only replaced my muffler, cats and resonator are still there.

 

Get rid of the resnoator and your MDS

 

I thought the resonator would help by staying on and I don't think the 4.7 has MDS.

 

Sorry didnt even realize that you had the 4.7 such a big truck i thought forsure 5.7.
I have no clue then as to why its droning, i have straight pipe(with cats) it quieter than a aftermarket muffler idiling, with no drone at any speed

 

All of my Magnaflows droned like hell. Thats why I took them off. They sound good until the tranny slips into OD, then it goes bad.

I know most people love their Magnaflow. I did not. Live and learn.

 

How does it sound with no Res and stock muffler?

 

I got headders and a Magnaflow with dual outs on my 5.7. I think it sounds best at highway speeds around 1800 RPM and up. (about 60+ MPH)

 

I prefer MDS on. some say theres MPG gains. but Ive noticed that isnt so for my truck. So i keep MDS on.

I like hearing my drone, lets me know when im saving fuel.

 

Lol your the only person ive heard say they want MDS on

 

took mine off, switched back and forth for awhile. i actually liked it on but going to LTs i turned it off