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yeah, the GPS speed on my dashcam is a little slow to update. I did have my TorquePro app running on the performance screen and it did say 9. something seconds for 0-60. One of these days I'm going to find a nice stretch of road and try the 1/4 mile just for fun
the stupid rear wiper was going on the slowest setting 
fixed my headlight problem (bad ballast), drilled a couple holes in the fender liner and zip tied 2 of the loose body harness under the fuse block, dealer can order a new connector but I would have to re-pin it so I may just hit up the good junkyard next time I go for a couple of the pigtails I need. after I was finished I was sitting in the truck with the key on and kept hearing a thump-thump sound every 45 seconds or so. I thought it might be my amp and subwoofer doing something weird so I opened the rear hatch and sat there for a minute, no noise, so I closed the hatch and the noise returned it kind of sounded like the rear hatch actuator was trying to re-lock so went back and pushed and pulled on the handle and it's all snug, then I realized what the sound was
I thought for sure it was the rear hatch lock doing something weird and I was about to grab the tech2 then I saw the rear wiper was out of the parked position
and i had just been messing with the wires at the fuse block so I was like great.....new problem
Is that a quarter-wave attenuator? I put a couple of those on my Mustang back in the day. After swapping to a catless h-pipe and Flowmasters, it had a bad drone around 2250rpm, right at highway cruise speed in fifth gear. The attenuators cut the sound power to less than half (-4dB) at that rpm. Worked wonders.I finally got this done. My dumbass welded it on the wrong side of the muffler, should have been on driveshaft side. Ended up needing a decent "clearance" dent to fit. Haven't hit the highway yet, just a quick trip around the block, it has definitely changed the tone as far as i can tell at idle. Can still hear under acceleration, my intake drones under mild load also [emoji2373].
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Yes hemholtz chamber aka ¼ wave. It works pretty well considering i didn't do any math i just copied what some of the guys on one of the forum's for a Silverado in my searching. My 2k rpm drone is gone. My afm still is annoying but will be going away eventually.
