Borla Exhaust for Kia Stinger

[Kamauxx]

I don't think most here would like My mustang then.. Ceramic shorty headers, O/R H pipe, 12" glasspacks, and Trident Motorsports Axlebacks.. you can hear me a few blocks away when I get on it. Also it's a convertible so you can hear it inside pretty well too.

I think it's expected for muscle cars though. My Camaros and GTO were all stoopid loud!

 

[JimB]

"Performance Luxury" car, that's what a Stinger is all about. I love my Borla exhaust outside, just want to dampen it INSIDE.( That short Vid I posted shot with a cell phone really doesn't do it justice) I have the HK stereo and I want to be able to enjoy it. The problem with the Stinger is the sportback. If this car had a trunk it would probably sound perfect. But, in the end it's each to his or her own and I am going to fix my issue in a manner that pleases me, as should everyone else.

FYI, when that Borla comes on the pipe, it rocks. I understand the "Ferrari" comments, it does have a European sound to it but it's not a V8.

The other thing that this car has a bit too much of is road noise. Not as bad as my Optima SX but still needs work in the doors.

Everyone just chill and enjoy your car or, if one is in your future, just read the comments here and you should be able to make a more informed choice when the time comes. I will see if I can't get a decent interior audio to post this weekend when my wife and I drive to Cali.

 

[JimB]

My wife and I went to California this weekend and it was the first long road trip weed had with the Borla exhaust.

We found a simple solution to the interior noise problem using common household items.

it works perfectly!

 

[Mach_Tuck]

So there is hope with sound batting or deadening material then...for those that desire it anyway.

At least this is a good "method" to see "what" could be accomplished.

 

[JimB]

Yeah....we went down with only one suitcase in the trunk and came back with all of that stuff. Going down was rather noisy but coming back I'm estimating probably 60% of the noise was gone. I'm going to say that soundproofing in the trunk area is going to solve the problem based upon my experience this weekend.

As stated above I'm going to put soundproofing in mine this weekend and I'll take some pictures and let everyone see what I did.

 

[JohnG7]

Since I have done my soundproofing/damping, my car is a pleasure to drive (now). All of my sound controls are unseen from above. I still plan to dampen things under the back seat eventually.

It's still loud when I want it to be, it is such a sweet sound.

It is a simple operation that really needs no pictures. Is kinda like all the other cars I've done before. Our Stingers have sufficient sound dampening for the OEM exhaust, not sufficient for exhausts with sound.

It's very simple guys, you can do it!

 

[JimB]

My backsest seems to have something under it I think maybe it's subwoofers but haven't investigated thoroughly yet

 

[Yellow Jacket]

Well, it looks like Magnaflow noticed the interior noise as well. Their new system has helmholtz resonators right next to mufflers.

 

[Mach_Tuck]

Well, it looks like Magnaflow noticed the interior noise as well. Their new system has helmholtz resonators right next to mufflers.

That would be in line with the MF thread stating it was "quieter" than the Borla

 

[JimB]

So I added some soundproofing to my Borla equipped Stinger 3.3TT this weekend with what I consider nice results.



I added a layer of Second Skin Damplifier Pro to the trunk areas where I could without interfering with the fit of trunk panels.

I then added a layer of Second Skin Luxury Pro to as much of the battery recess as I could.






In my estimation on acceleration 30% of the interior exhaust noise is gone, some frequencies of sound more than others. But, at cruise speeds at lower power I would say that 65% is gone. Whatever the actual numbers it made a noticeable improvement to my ears.

 

[Ozstung]

So I added some soundproofing to my Borla equipped Stinger 3.3TT this weekend with what I consider nice results.

View attachment 7864

I added a layer of Second Skin Damplifier Pro to the trunk areas where I could without interfering with the fit of trunk panels.View attachment 7862

I then added a layer of Second Skin Luxury Pro to as much of the battery recess as I could.



View attachment 7863


In my estimation on acceleration 30% of the interior exhaust noise is gone, some frequencies of sound more than others. But, at cruise speeds at lower power I would say that 65% is gone. Whatever the actual numbers it made a noticeable improvement to my ears.

Was it an easy job to install? Time consuming?

 

[JimB]

it wasn't overly easy nor was it extremely hard but it did take about 5 hours total.

took me a minute to figure out how to pull off the panels from the side and then took me a little bit longer to figure out how I was going to lay the material in and where because you can't put material in certain places because you got panels that need all the available real estate to go back into place.

I probably need to go in and rework the area around my battery because the Luxury Liner Pro didn't seem to stick too well with the spray contact adhesive but the Damplifier Pro is extremely easy to mold to the contours and once you lay it down it's not coming off.

 

[Kazz]

Nice job and thanks for the pics and review!

 

[Goodmang37]

it wasn't overly easy nor was it extremely hard but it did take about 5 hours total.

took me a minute to figure out how to pull off the panels from the side and then took me a little bit longer to figure out how I was going to lay the material in and where because you can't put material in certain places because you got panels that need all the available real estate to go back into place.

I probably need to go in and rework the area around my battery because the Luxury Liner Pro didn't seem to stick too well with the spray contact adhesive but the Damplifier Pro is extremely easy to mold to the contours and once you lay it down it's not coming off.

Great job!!! I started by just stuffing towels around my spare... after reading the forums I bought a dynamate generic from Amazon... just doubled it up around the spare... no sticky or anything... what and improvement... added a few more towels... Ferrari all over again

 

[NYdito]

So I added some soundproofing to my Borla equipped Stinger 3.3TT this weekend with what I consider nice results.

View attachment 7864

I added a layer of Second Skin Damplifier Pro to the trunk areas where I could without interfering with the fit of trunk panels.View attachment 7862

I then added a layer of Second Skin Luxury Pro to as much of the battery recess as I could.



View attachment 7863


In my estimation on acceleration 30% of the interior exhaust noise is gone, some frequencies of sound more than others. But, at cruise speeds at lower power I would say that 65% is gone. Whatever the actual numbers it made a noticeable improvement to my ears.

Was it worth it? How much material did you use? Any tips?

 

[JimB]

Yes, it was for me. As I said, not all of the sound is gone but under cruise rpm I barely hear my exhaust at all, if any, with the radio on at a normal volume.
According to Second Skin:

"The first step at reducing noise is to reduce structure borne resonance. This is accomplished by installing a Constraint Layer Damper (CLD): Simply cut, peel and stick to prepared fiberglass, aluminum or sheet metal.

Damplifier Pro is engineered for automotive use and will reduce vibration noise associated with powerful sound systems, road/tire, engine, and exhaust vibration. Utilizing a 6.5 mil annealed foil combined with 2 mm of the highest quality butyl rubber. Damplifier Pro will handle up to 450 degrees F and will not out-gas, melt, or fall off."

Sounded good and this stuff had nothing but excellent reviews so I bought a 12 pk (20 sq/ft) for $120. I have 4 sheets left so I could have boughten an 8 pk but I intend to use the other 4. I also bought 2 rolls (18) sq/ft) of Luxury Liner from the same company. However, I couldn't really use it in the areas I treated and, in my opinion, was wasted money even though it is an excellent, but different, product. It is made to go on top of the Damplifier Pro for added noise reduction.

Tips. Don't bother with taking off the side panels as there is several computer brains and various electronics behind them and no real place to use your material. Just concentrate on the spare tire area and it is easy to get to.

Get yourself several Flat Rate Priority Mail envelopes, use them to cut templates. I found that the Damplifier Pro will mold to contours almost exactly as that thin cardboard does. Lay the template on the sheet, draw around the template with a marker, and use a pair of large scissors to cut out your piece. You will get tar-like build up on the scissors but it will clean off with solvent.

You are supposed to use foil HVAC tape on the seams or an equivalent, but I didn't have any, so I used black Gorrila Tape, as you can see in the photos. I used the handle of an old screwdriver to rub the material down tight.

If you look at the second pic, you can see the Luxury Liner Pro(gray in color) down inside the battery pit. It attaches with contact adhesive but didn't want to stick to the contours very well and it is too thick to place anywhere else or it will interfere with the panels and spare.

I am going to see if its acceptable to put a second layer down on top of the first for added benefit, if not, I will use it elsewhere.

Hope this helps.

 

[JimB]

Oops..just reviewed install instructions for the Luxury Liner Pro and I placed the wrong side down. The gray side goes down. I will rework that area this weekend and let you know if it sticks better and adds to the noise reduction.

 

[NYdito]

Yes, it was for me. As I said, not all of the sound is gone but under cruise rpm I barely hear my exhaust at all, if any, with the radio on at a normal volume.
According to Second Skin:

"The first step at reducing noise is to reduce structure borne resonance. This is accomplished by installing a Constraint Layer Damper (CLD): Simply cut, peel and stick to prepared fiberglass, aluminum or sheet metal.

Damplifier Pro is engineered for automotive use and will reduce vibration noise associated with powerful sound systems, road/tire, engine, and exhaust vibration. Utilizing a 6.5 mil annealed foil combined with 2 mm of the highest quality butyl rubber. Damplifier Pro will handle up to 450 degrees F and will not out-gas, melt, or fall off."

Sounded good and this stuff had nothing but excellent reviews so I bought a 12 pk (20 sq/ft) for $120. I have 4 sheets left so I could have boughten an 8 pk but I intend to use the other 4. I also bought 2 rolls (18) sq/ft) of Luxury Liner from the same company. However, I couldn't really use it in the areas I treated and, in my opinion, was wasted money even though it is an excellent, but different, product. It is made to go on top of the Damplifier Pro for added noise reduction.

Tips. Don't bother with taking off the side panels as there is several computer brains and various electronics behind them and no real place to use your material. Just concentrate on the spare tire area and it is easy to get to.

Get yourself several Flat Rate Priority Mail envelopes, use them to cut templates. I found that the Damplifier Pro will mold to contours almost exactly as that thin cardboard does. Lay the template on the sheet, draw around the template with a marker, and use a pair of large scissors to cut out your piece. You will get tar-like build up on the scissors but it will clean off with solvent.

You are supposed to use foil HVAC tape on the seams or an equivalent, but I didn't have any, so I used black Gorrila Tape, as you can see in the photos. I used the handle of an old screwdriver to rub the material down tight.

If you look at the second pic, you can see the Luxury Liner Pro(gray in color) down inside the battery pit. It attaches with contact adhesive but didn't want to stick to the contours very well and it is too thick to place anywhere else or it will interfere with the panels and spare.

I am going to see if its acceptable to put a second layer down on top of the first for added benefit, if not, I will use it elsewhere.

Hope this helps.

Thanks man I apréciate it let’s see if I could order it and do it next month.

 

[DiabloStinger]

I have plans for this exhaust in the near future. Nice to hear that a small amount of sound deadening material is the fix for low rpm drone. I wonder, if you JUST deadened in the spare wheel well would you have to remove many panels? Just hate those damn clips for the last 25 years.

 

[JohnG7]

I have plans for this exhaust in the near future. Nice to hear that a small amount of sound deadening material is the fix for low rpm drone. I wonder, if you JUST deadened in the spare wheel well would you have to remove many panels? Just hate those damn clips for the last 25 years.

Hello DiabloStinger,
The only panels I removed are the temporary ones that you remove to get to the spare tire.
I used Dynamat for my first layer, then I used a vasco foam/fiberglass 2nd layer, sorta like what the others did, and it does make a little difference, but not nearly enough for my desires.
I then used some Vasco foam for a trial to fill in around the spare and into the center of spare. This took another dB or so away, I then used another layer of sound deadener with dampening on the spare tire cover (underneath). Once all installed, you don't even know it is there EXCEPT the sound inside is much, much lower.

I already deleted my phone pics of the first couple layers, mine look similar to these other pics except I took my dampening all the way to the rear seat.

I also used a few pieces of sound matt underneath the car on flat panels that need dampening to reflect sound.

This may sound like a lot of work, it's easy peasy- results are such that my wife now likes it too (it is my car). It still CAN BE LOUD if you want it to be, like cruising at 70-75 in Sport mode. This puts me in a loud zone- so if I drop it to Smart mode, it's is quiet again.

I used the vasco foam for filler in the spare tire area (this huge open area around the tire), this density worked great (is temporary for testing)- <I won't use anything flammable when completed so I will end up going with denim filler soon>.

I do still have pics of my work from the spare tire up saved if anyone wants to see them, it's quick and easy- I do this to most of my cars anyway. There are so many good sound damping materials available. It seems like every bit I did seemed to help a little more. I think the top layer (on the tire cover) and foam fill made the last big difference I was looking for.

KIA didn't do much sound damping- they didn't need to. Now it is like I want it!!!
I will probably fill in under rear seat at some point too, just for grins.

edit- dam autocorrect