iwannaseeatnight

I think as long as I don't go overboard and use the whole tube it should be fine. Probably just get a good coating covering one side. I've used it on lots of connectors at work and it's thin enough that it will express out the sides if over used.

I got mine last week, just waiting for my truck to get back from the dealer (a loooong list of issues) and then install. I plan to fill all connectors with dielectric grease, so that should stop any water penetration.

I've had it installed for about a week and a half. There is a drone on the highway, but after hearing the drone with a muffler delete, it's not bad at all. Little more growl on cold start than stock, same at idle. Sounds a little louder than stock on acceleration in the cab. Haven't got to hear it outside the truck under acceleration or just revving. All in all, I'm happy with it. I do wish it was a little louder, but I could probably spend a year testing different mufflers. If I ever do change again it will be to a cat-back. That way I can go a little louder without increasing the drone.

2021 AT4 1,400mi. My issues aren't to the extreme as some of yours (yet). But the past week it will intermittently refuse to connect to SXM, and yesterday when backing the screen was black except for a small camera icon with a red line through it. Even in park when I would tap the camera app in the menu nothing would happen.

Had the Pro XS installed yesterday on the way home from work. Only charged $30 this time! Definitely quiets it down. Still drone on the highway, but not near as loud and I would say tolerable. Slightly louder than stock on acceleration in the cab. Haven't had a chance to have someone rev it while I'm behind to hear it. Cold start this morning had a bit of a grumble, but not near as loud as the muffler delete which should make the wife and neighbors happy (she said deleted cold start startled her out of bed ?). I'm going to leave it this way for a couple months to let the muffler settle in and get some soot build up, then see where it's at.

Thanks for the info. I had the stock muffler deleted yesterday and it is definitely too loud for my particular taste. I left the flapper ('21 only has one before the muffler) and resonators. Ordered the XS and hope to have it installed early next week. Looking for mostly quiet, just want to know its a V8 when I get in it. Hopefully it does the trick!

What they do to these trucks is awful. Restricting airflow in and out, the dfm, and everyone's favorite... auto stop/start. Spend all that $ on a truck just to spend even more to undo the nonsense. Love to cut out the flapper, just worried about added drone. There is another exhaust thread on here that had a bulletin on bolting it open. May try that as its easily undone. On my '15 I had cai, borla cat back, and afm disabled and just that made it so much more responsive. Over extended a bit on the specs on this one so don't have as much cash to play with ?

Your shops are expensive!! I paid $55 for the muffler delete, just a straight piece of 3.5" welded in (they found a 4' piece in the back). Pro XS is only $97 + another $55 to install, so only be at $217 total. If that doesn't suit me I'm just going back to stock (yeah, another $55).

The manual thing definitely helped, but still just not for me. Way louder than what I was hoping for, at least on the highway. I just order a Borla Pro XS muffler (40359) and I'll have it installed hopefully next week. Exhaust shop is gonna love me by the time its all said and done!

The drone would be tolerable if it was one note. Never realized how active the DFM is. Just non-stop note changes from constant configuration changes. So far gotta say I'm not loving it, and Pulsar's are backordered for the foreseeable future. I'll give it the week to see.

Kept resonators and flapper, just muffler delete. Apparently YouTube videos don't get great audio cause it is WAY louder than expected inside the cab!

Mine necks down to 3 for the muffler, but then goes back up to 3.5 after. Its probably only temporary so just letting the shop use their 3" pipe. Can't be any worse restriction than the muffler, right. He's cutting now so we'll see how she sounds in a few minutes.

Happen to know what diameter pipe they used? None of my local shops carry 3.5" to match stock piping. Wondering if it'd be a big deal to have them just use 3".

Did you leave the flapper too? How's the drone? Thinking about deleting the muffler on my '21 AT4 6.2. The cat back is too much, IMO. Love to just swap to an S-Type muffler, but Borla told me no dice, they want me to buy the $1450 system.

Wasn't just me, there were tons of reviewers with the same issue. Love to try the Pulsar, but no one has em.

Looking to upgrade the exhaust on my '21 AT4 6.2L. I had a Borla cat back on my '15, but what they're charging now doesn't seem worth it for a better exhaust tone and minimal hp gain. Was thinking about a muffler swap to a Borla Pro XS. Anyone done this? Planned to leave the flapper and resonators,, but was wondering about drone too. Also part #? I've seen some using 40359 on their '20s, but its a 3" and Borla says the '21 6.2L is 3.5". Not sure what to make of it cause all they seemed interested in was upselling a cat back. Thoughts?

Anyone with the Pulsar LT have any issues with battery drain? I had the Range AFM Disable Module in my '15 Sierra and if it sat a couple days the battery would be dead. Had to unplug everyday when I got home.

If it was the other way around and you were selling the touring system I'd be all over it. S-type is just a little too loud for me Also, it is the same system for a crew cab standard bed, but you do need the pipe extension to make it work.

Bone stock, no tune or nothing.

Update... I just filled my 8th tank of 93 this morning and the marbles are still rattling as loud as ever. Baffles me that GM refuses to address this issue. I've had enough and am seriously considering trading it in.

So all you did was run the 93 and it went away? You had the same one as me, driver's side by the left foot?

2017 6.2. CAI only, everything else is stock (currently 6800 miles). No tune or Range. It's under low, cruising throttle, maybe 1600-2300rpms. Like you said, just giving light throttle to compensate for an incline. If I dig in it I don't hear it, but that may just be the engine drowning it out. My thinking is stuck on it being an exhaust leak. It didn't start until around 4k miles and has gotten worse, like it is something that loosened over time. It also gets louder the longer I've been driving, like when the exhaust system gets hot and expands. Maybe when I can get some free time I'll get some permatex and try sealing every clamp to see what that does. Frustrating that the dealer keeps telling me that its normal. Yeah, no. Also, my 2015 5.3 (Range AFM disable, Borla Catback) never had this issue. Traded in at 28k miles.

Here's the links they gave me for the uploads, hopefully it works. https://ufile.io/kyu11 https://ufile.io/n9jys

Any suggestions where to upload? I don't have any of the social media stuff.

I have the exhaust leak, but the sound is coming from the driver's side floor. The sound could be traveling, however, passengers say they don't hear it. I have a recording, but the file is far beyond the 4.88MB limit.