exhaust advice please

[Timgilardi92]

Hi all!

New to the forum but I seemed to be on this site atleast once a day for the past few years so I figured I'd join.

 

I just recently traded in my very beloved 06 silverado 1500hd. And I miss it dearly lol I seem to get very attached to my trucks. I bought a 2015 silverado 5.3 double cab. I like it alot but it's just not "mine" yet if you know what I mean.

 

Today I wad at my local exhaust shop to give my new truck some sound. And I'm actually very unhappy with it. It's extremely quite.

 

I wad looking for a sound that was similar to my old 6.0 vortec with original 40 flowmaster. That sound was music to my ears. So we opted to do a super 10 on my new truck and leaving the resonator on. The guy at the muffler shop told me that would be the most similar set up to my old truck. So that's what we did and this thing is just extremely quite. You can hardly tell there's anything at all done to it. I crawled under my truck tonight and it is definitely a super 10 under there. But it is just way to quite for me.

 

So my question is should I just cut off that resonator and will that make a drastic difference in sound that I'm hoping for?

 

I miss starting my day the V8 way. I start up my new truck and I feel like it sounds like a prius.

 

Any help and advice is much apreciated!

[Binobanbino]

Welcome to the forums. Yes these truck stock are super quite. GM must have their reasons. Well I wanted some sound from my truck as well. So I went with cutting off the factored muffler and flapper and I was super happy with the sound. No drone while cruising around and when you get on it WOW it sounds amazing.

 

I can't stress enough how good it sounds. Also for $60 you can't beat it. Good luck with the truck and I hope you find something that you like. Enjoy the truck.

[Timgilardi92]

Thanks for the info. So your running with no muffler at all? I'll have to think about that for the future. Rifht now I'm just a bit disappointed since I spent this money for a super 10 muffler amd yoy can hardly hear anything lol. Does the resonator on the tail pipe hold the sound back alot?

[OmniCamaro]

The VVT on these engines makes it difficult to get the exhaust just right. At low speeds especially, when the motor goes into its 4 cylinder mode it can sound absolutely terrible. I have some experience with a VVT exhaust from my 2011 Camaro but I fixed the problem with a tune. I've seen posts where others have been successful but it's usually a full exhaust kit (way more money). Hopefully someone that has had success will chime in.

 

 

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[Timgilardi92]

That's my biggest concern is when it goes into v4 mode. I'm not a big fan of it anyway. I csnt see much of a benefit for the engine to constantly be turning off and in half the cylinders. I don't think I want to tune it and worry about losing warranty, which is half the reason I bought a new truck in the first place. I saw somewhere there's a company out there that makes a plug in only to turn off the afm. I forget the name of the company.

 

Please someone correct me if I'm wrong so I don't make a mistake. But cutting the resonator and leaving the super10 should give it a nice deep rumble correct? Then I just need to deal with the v4 mode.

[OldBlue61]

Cutting off the resonator SHOULD give you more of a rumble. There is a 135+ page muffler thread HERE.

 

You could run the transmission in Manual 5 to avoid dropping into 6th and that will keep it out of AFM mode. AFM is only active in 6th gear (from what I've read).

[Dnt]

my local muffler guy said he did a local 15 GM 6.2 truck and they replaced the factory muffler and flapper with a short magnaflow muffler and moved the resonator up between the new muffler and catalytic converter. Claimed the guy really liked it. $500.00 out the door. I have been trying to track him down to check it out but no luck so far. My dealership "ADVISOR" said if I messed with the exhaust it would void my factory warranty so I spent over 3 times that amount for the GM Borla with the flapper valve etc. installed at the dealer. I get a funky (best way I know to describe it) V4 noise at low speed sounds like a small helicopter following me. I Do NOT like it and am considering ordering the Range device to turn the V4 mode off. Not heartbroken about spending the money on the exhaust but I would not have done it that way if I had known what the end result would be. Hence my post letting folks know. I am attaching a YouTube video with a clip of the new GM Borla the computer does not do it justice it sounds deep / mellow and I REALLY like the way it sounds in V8 mode, just loud enough to suit me. I would call it a Gentlemen's exhaust system I Guess LOL

 

 

[Timgilardi92]

Hmmm. Moving the resonator in front of the muffler? That sounds like a good idea actually. Theoretically still reducing drone but not taming the tone out of the muffler. I think anyway lol. I guess I'm no expert but it kind of makes sense to me. I thought long and hard about getting it cut off today. But I think I'm gonna keep me the way it is. Atleast for now. I drove around a lot today just to listen to the exhaust and it seems to be a bit louder today. I know some people swear they need to break in a new muffler. Some people on the other hand completely disagree. And I'm just not knowledgeable enough on the subject I guess. But it definitely seemed atleast to me a little louder today. Still nothing like my old 6.0 vortec though :/.

 

I did notice drone though for the first time. Only in v4 mode. It was very minimal but it was there if you listened. It definitely was not exhaust note. I think in the near future I'll get my hands on that range afm delete plug in thing and then maybe I'll cut off that resonator and unleash some real sound

[SouthernSilveradoGuy85]

The resonator above the rear axle does quiet it down a lot. I had a shop remove everything from the muffler on back and then put in a Flowmaster Super 44 single in/dual out and I love the sound. A cold startup could wake the dead. In the winter I remote start it from the back of my bedroom which is in the back of the house and I hear it just fine from inside the house. I park on the street by the way, so not in the driveway where it's close to the house. So your Super 10 should be even louder and more aggressive. So I would take the tailpipe off and put on another one that's just the pipe. Or just have the resonator cut out and maybe they can make a piece to fit in the spot with no problem.

 

I still have the AFM running and I actually don't mind the V4 sound because too me it sounds like the engine/Jake brake on a commercial truck.

[Binobanbino]

Thanks for the info. So your running with no muffler at all? I'll have to think about that for the future. Rifht now I'm just a bit disappointed since I spent this money for a super 10 muffler amd yoy can hardly hear anything lol. Does the resonator on the tail pipe hold the sound back alot?

Yes no muffler or flapper. I have some friends with the same motor and with the $1500 Borla cat-back and they pefer the sound of my truck. They say mine has a lower tone. Belive me I checked out a lot of truck and I really like the way I went. No regrets what-so-ever.

[Blackborla]

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[Blackborla]

I have borla atak cat back system and I gutted that third resonator and it growls way more it lets the exhaust sing more than getting that swish noise after it reeves up.

That's my 2 cents it dose wake it up more

[FL335i]

I did a cat-back AFE. I like it. Perfect sound. Took a while for it to carbon up and not be as annoying in V4 mode, but after about 10k miles you can't hear a difference in either 4 or 8 mode. I did not like the honking large hokey tip they include. I bought a MBRP tip and fit it on, looks perfect, sounds perfect. Much improvement in response too. I "know someone" that hollowed out the 3rd cat and that was even more responsiveness. I don't mess around with muffler shops with so many mandrel bent pre-engineered kits that are bolt on and stainless.

[gnorman]

i thought i would weigh in. i just joined the forum and i did some exhaust work last week and wanted to share what ive learned through my experience. ive never had the afm on a vehicle before. my last truck was a 98 5.7 liter.

anyways i did a bunch of research and devised a plan based on what i read. the goal was to get sound and eliminate drone as much as possible. i bought a borla pro xs 3 inch in 3 inch out offset offset muffler some adapters and a dump. figured i would go with the dump until i decided to have a shop run a pipe out the back. i did not want to cut the resonator and weld a pipe in for the fact i didnt want to see a welded joint through the wheel well.. so i cut the exhaust apart welded up my setup and clamped it in. the biggest mistake i made was welding in the flapper valve right after the muffler just like they had done on the stock setup. it sounded like complete crap. almost like you have a huge exhaust leak and a stock muffler. it is incredible how that little valve kills all rumble coming from a muffler..borla is straight through design and you couldnt even tell it was on the truck. so i clamped the flapper open for now and got the sound i was looking for will cut it out later...very good sound very nice rumble and very loud under loaded wide open throttle ...i think its just the nature of the trucks to be quiet at idle. but thats ok with me....that brings up the next issue... the v4 drone....its terrible....so terrible... you can not miss when it switches...and it does it alot.... more than you realized before...they said it would be bad and it is...so i ordered a tuner to get rid of that....so i guess heres what ive learned from my experience in a nut shell .....hope it helps you on your decision.

 

1. keeping the flapper valve with any type of muffler will kill most of the desirable exhaust note and level you are after.

2. resonator in the rear will also absorb much of the exhaust note and level.

3. any exhaust configuration other than stock will benefit from an afm delete. v4 drone is terrible. you will hate it.

4. idle is very quiet with borla pro xs (may be nature of truck) it does have 3 cats