Terrible Drone, Loud Exhaust need assist

[Claytonn]

Hey fellas, I just want to say ive been scouting the net for information on Cabin drone and loud exhaust setups and almost everything everyone says is quite confusing and debatable. I apologise if it was mentioned somewhere here on the forums.

I currently own a 2006 Yukon denali and i put in a new Engine the same as stock a 6.0L LQ4
The only things ive changed in this setup is the Air intake, headers, the intermediate connecting Y-Pipes (catted)
and a magnaflow Catback exhaust

The list is exactly what i have listed below

Air Intake

https://www.summitracing.com/int/parts/knn-57-3050/overview/

Kooks Headers 1 7/8

https://www.summitracing.com/int/parts/kok-28502400/overview/

Kooks Connecting Y-Pipes

https://www.summitracing.com/int/parts/kok-28523200/overview/

Magnaflow Cat-back Exhaust

https://www.summitracing.com/int/parts/mpe-15734/overview/


I also almost forgot to mention that when i purchased the new engine, they put a performace camshaft in there which makes my car vibrate like a motherkoony on startup, im not quite sure if this adds to the sound being overly loud.


On start up it almost blows my neighbors out of their houses in my street, My mom can hear me coming home from a mile away even so i cant sneak in the goddamn house when i want to.

I've read some reviews and scoured YouTube for resonators people have installed, Some say it works and cuts out drone some say it does nothing.

I've been looking into Vibrant Ultra quiet, but that is up for debate cause really people cant give a definite review.

I get terrible drone at highway cruising speeds cant hear the radio or speak to anybody in the car with this overwhelming noise. Around 1800@rpm - 2500@rpm is the worst. Even at idle is pretty loud enough for the cops to have already stopped me once and give me a warning, i told them yes i have to go to the garage and get it sorted.

Honestly if anybody has any similar experience, i would truly appreciate if you could help me out.
Since my exhaust has 2 pipes going into the muffler and a single exit coming out into the tail pipe,
im confused with this? do i need to put the resonator after the muffler like the Vibrant ultra quiet? because most people say its better with resonators before the muffler, hence will i need to buy 2 bottle styled ones?

I honestly cannot afford to go back to stock since i saved up a long time to buy out this system and spent the money. Any ideas on which resonators to use? and where can i place them?, which ones really work etc?. i get most of the drone in the front area Of my Denali around the mid section, so i know i have to combat it there.

Also i would like to say im sorry in advance since im really noobish with these kind of things and im slowly learning, i knew about loud exhausts but had no clue since ive had no reference it would be like this, i was assuming it would just be normal.

Any good resonators and information would truly be helpful and id be honestly grateful if anybody could help me out.

I'll try to post pictures of what it looks like under the car, and also the sound the exhaust makes.
As much as i love the deep growl when i press the accelerator, overall the sound is incredibly loud when i do nothing.

Thank you beautiful community of TYF in advance for any knowledge shared, much appreciated!!.

 

[randeez]

I would have thought it should have been pretty tame actually with the catted ypipes, and magnaflow.

I've got headers no cats on the ypipe and stock cat back on my 6.2...its def louder but even cold start isn't terrible. I'll remote start in morning and barely here anything in house. I'd crawl under and make sure something isn't separated, open spare o2 bung, all joints are sealed etc.

The lumpy cam, have you have it tuned?

 

[PG01]

Shit, i used to shut the car off and roll down my street....

I would go to jy and find a stock exhaust and swap everything after ypipe in

And tell the cops.... wut? I cant hear you?... almost got locked up a few times

 

[adventurenali92]

I had a client that I detailed for often and would drive with him often when he bought or sold a used car, that had a 2002 xl Denali with the 6.0. His had a magnaflow exhaust and it was exactly what you’re describing. Even driving around town speeds was miserable because it was so loud. When I was looking to do a muffler swap in September, all the research I did on the magnaflow mufflers pointed to it being super loud and lots of drone. I did end up with a magnaflow, but I thinks it’s only a stage one so slightly less restrictive than stock and pretty mild. I only did the muffler, not the full exhaust. So it’s a bit louder under heavy load and wide open throttle, but it’s not unbearable. I can listen to music or talk with people just fine and it’s not too loud that we can’t hesr over it. Maybe you should swap out the muffler for a different one.

 

[Claytonn]

I would have thought it should have been pretty tame actually with the catted ypipes, and magnaflow.

I've got headers no cats on the ypipe and stock cat back on my 6.2...its def louder but even cold start isn't terrible. I'll remote start in morning and barely here anything in house. I'd crawl under and make sure something isn't separated, open spare o2 bung, all joints are sealed etc.

The lumpy cam, have you have it tuned?

Yes I've got it tuned twice, both Road tuned

 

[Claytonn]

Shit, i used to shut the car off and roll down my street....

I would go to jy and find a stock exhaust and swap everything after ypipe in

And tell the cops.... wut? I cant hear you?... almost got locked up a few times

Hahaha! As much as I'd like to, I honestly don't want to sell this system I've installed since I took ages to save up and buy it, i do know there are people that have countered this by changing their mufflers or adding in resonators. There's just 1 exhaust shop down here in Dubai that makes their own exhaust setups and the dude was like "I'll make you my own cat-back setup with a switch, it'll be louder than yours and you can turn off the sound for $1279". I was like wtf man, this makes no logic. I'll spend $$$$ for a louder setup and a switch to turn it off??????. What kind of ******** is that.

Hopefully I'll come across some assista

 

[PG01]

He’ll prob put in sn electric cutout, open after ypipe, the hit the button and cutout closes to go thru reg exhaust...

 

[Claytonn]

He’ll prob put in sn electric cutout, open after ypipe, the hit the button and cutout closes to go thru reg exhaust...

True but it makes no sense to spend so much for a switch, why would I ever turn it on when I'm trying to tone down the sound overall.

 

[PG01]

True but it makes no sense to spend so much for a switch, why would I ever turn it on when I'm trying to tone down the sound overall.

Your mechanic, im just thinking out loud bud....

 

[randeez]

I go thru this same crap with many shops and wondered if it was just me. Most people do this stuff to get noticed i guess.
I really just want it to be faster, handle better, smooth and quiet.
if I could keep it quiet as stock I would, if I could get the idle as smooth and not noticeable as stock I would. Wheels, really just want something low key.