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I added a padded floor mat on the entire cab floor. It didn't help much with the sound but hopefully eith keeping the heat in this winter. I finally put a muffler on. Fit it in the mirror brackets. That made a noticeable difference in sound. Jones 5050xl A couple peterbilt clamps and poly...

Ok thanks. The video is not that great anyway! That was my first time playing with my dash cam and trying to post video. I'll figure out how to embed the next video. I'm hoping to get my truck under 90 db

http://cloud.tapatalk.com/s/5906313458c37/MOVI0008_1493577620958_1493577817604_1493577890285.mp4 A short clip from the video I took. Next time I think I'll just use my phone, it has a better mic.

Only 103 db on todays outing. My dash cam doesn't have a very good mic evidently. First attempt at video Sent from my SM-G930P using Tapatalk

The noise maker! 86.6db at idle, in cab, windows up Trying to make a mount for my dash cam now. Video to come

I didn't think I could fit a full muffler in the mirror bracket. That sure opens up some more options. That's a nice install.

Army noise comparison https://www.google.com/url?sa=t&source=web&rct=j&url=http://www.vi.ngb.army.mil/html/safety/docs/Noise%2520in%2520Army%2520Equipment.pdf&ved=0ahUKEwirnvP8qcPTAhVFJCYKHX-yBSQQFghiMBQ&usg=AFQjCNFuInikKp2SFsEh0E8PmAMyVYnACg&sig2=P4lnHyrmk6O4k9Qc4q8tAw Sent from my SM-G930P...

I have a soft top. It's insulated but it needs replaced. The fabric of it has gotten thin and is getting harder to repair. There isn't much room for the exhaust to go under the truck but I'm not counting that out yet. I ordered some 80 mil noico, like dynamat. After I set some baseline numbers...

It's never going to be quiet but it needs to be quieter. I have added a turbo and Jakes to my M818. The muffler was removed to make room for the turbo. The exhaust is straight through. I've had it this way almost 2 years. I got a decibel meter to see how load it really is. I played with it...