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Old 11-02-2012, 05:49 AM   #1
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Noise Level With Headers

Considering Headers but cannot find a clip (other then a manufactures) of the inside cabin noise level.

Looking for some honest opinions about the increased noise level inside with headers, high flow cats hooking into stock exhaust.
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Old 11-02-2012, 05:53 AM   #2
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Won't really be able to tell much diferents on the inside. Although on the outside you'll be able to tell a tad bit..
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Old 11-02-2012, 06:43 AM   #3
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I could try and get a sound clip from mine. Inside it is only slightly louder than stock when driving around but pretty loud when you got WOT, which is exactly what I wanted.

Outside, I am told it sounds like NASCAR when I passed my friend at WOT on the highway.

I have SLP Long tubes with high flow cats and then the rest is all stock.
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Old 11-02-2012, 07:19 AM   #4
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Rpeka, I haven't done this on the Camaro, but I had long tubes and no cats on my 2005 GTO. I have found that the cars with the mufflers at the rear do not have that much of an interior sound difference when installing longtubes. My GTO was very loud on the outside, but inside the car it was very tolerable. I took my wife on a 5 hour drive in the GTO and she didn't complain inthe least about the noise. In constrast, my 68 Camaro and my old 1987 Aerocoupe Monte Carlo with the mufflers under the rear floor pan were much louder inside the car. It may also have something to do with how well they insulate the cars these days.
Bottom Line: Don't let the worry of increased noise keep you from doing this.
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Old 11-02-2012, 11:18 AM   #5
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Not bad on the inside...loud as a jet plane taking off on the outside.
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Old 11-02-2012, 01:49 PM   #6
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Quote:
Originally Posted by Happy_Dan View Post
I could try and get a sound clip from mine. Inside it is only slightly louder than stock when driving around but pretty loud when you got WOT, which is exactly what I wanted.

Outside, I am told it sounds like NASCAR when I passed my friend at WOT on the highway.

I have SLP Long tubes with high flow cats and then the rest is all stock.
Thank You
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Old 11-02-2012, 04:50 PM   #7
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Like everyone has stated... Not so bad on the inside but outside it's wicked when the muffler butterflies open up at WOT. I have some videos of the interior shared on here shot with a gopro so the audio isn't accurate of course but you can see we're talking in the car as normal. I even use my bluetooth with my phone on the freeway. Only an issue if I step into WOT.
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Old 11-02-2012, 06:27 PM   #8
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Quote:
Originally Posted by rpepka View Post
Considering Headers but cannot find a clip (other then a manufactures) of the inside cabin noise level.

Looking for some honest opinions about the increased noise level inside with headers, high flow cats hooking into stock exhaust.
Probably the Best all around combo is just this, with a set of Dynatechs you will be very pleased with the results.

Ted.
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Old 11-02-2012, 08:33 PM   #9
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Probably the Best all around combo is just this, with a set of Dynatechs you will be very pleased with the results.

Ted.
Hi Ted,

I was looking at the Stainless steel works. Why do you prefer the Dynatechs?

1 7/8---- 2" ----- 2 1/2? What is the difference. I would guess low end torque? I have an automatic.
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Old 11-02-2012, 08:43 PM   #10
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If I get a set of 2" Dynatechs and high flow cats (keeping the stock mufflers), do I need a new tune?
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Old 11-02-2012, 09:11 PM   #11
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So maybe this the wrong place to ask this and I am not trying to jack this thread but....

I am wondering what maker of headers you went with and why you chose them.
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Old 11-02-2012, 09:18 PM   #12
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Originally Posted by justindewoody View Post
If I get a set of 2" Dynatechs and high flow cats (keeping the stock mufflers), do I need a new tune?

Yes because you're increasing the amount of air flow exiting the engine.
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Old 11-03-2012, 06:24 AM   #13
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The reason I picked SLP is two fold. I know the work that SLP did on the 4th Gen Camaro SS and the Firehawk. The family along with GM kept the Camaro alive a couple of more years and they are a solid family business.

I was lucky enough to visit the plant and watched them build some headers. They have racks of steel made in USA. They take those long lengths of pipe and cut them and bend them to shape for each cylinder and put them in a bin. Then they take the 8 bins and weld the pipes together. They ceramic coat them, bake them and polish them all right there in Toms River NJ, USA. They use all quality, made in USA material, assemble everything in the USA with USA workers.

I love mine! Sound great, look great and made in USA.

I am not paid to do SLP commercials, LOL. That is just me and 12 years of experience with the Hamburger family and company.
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Old 11-03-2012, 07:17 AM   #14
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Quote:
Originally Posted by justindewoody View Post
If I get a set of 2" Dynatechs and high flow cats (keeping the stock mufflers), do I need a new tune?
Yes because the longtubes will relocate the cats further back which causes them to heat up slower which will cause a check engine light to appear. Also to get max performance a tune is a must.
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Old 11-03-2012, 10:13 AM   #15
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Quote:
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Hi Ted,

I was looking at the Stainless steel works. Why do you prefer the Dynatechs?

1 7/8---- 2" ----- 2 1/2? What is the difference. I would guess low end torque? I have an automatic.
I sell both, Either will do fine from a performance standpoint.

There are some Features that Dynatech has that no one else does that I prefer.

One of which is the Collector to Cat connection, Ball and socket with an OEM style Graphite donut gasket, Reusable, with 4 bolt 3/8 thick flanges.

I also like the GM gaskets and new bolts that are included.

Ted.
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Old 11-03-2012, 07:00 PM   #16
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I sell both, Either will do fine from a performance standpoint.

There are some Features that Dynatech has that no one else does that I prefer.

One of which is the Collector to Cat connection, Ball and socket with an OEM style Graphite donut gasket, Reusable, with 4 bolt 3/8 thick flanges.

I also like the GM gaskets and new bolts that are included.

Ted.
I am told that the Stainless Steel Works, you don't have to cut the belly pan.

How about the Dynatech?
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Old 11-03-2012, 07:35 PM   #17
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I ran Stainless Works and I don't know where you heard you don't have to cut the belly pan but mine were in direct contact so I cut it. Didn't need much and isn't enough to affect the function but I definitely would not drive it with the belly pan touching the collectors!
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Old 11-03-2012, 09:55 PM   #18
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I ran Stainless Works and I don't know where you heard you don't have to cut the belly pan but mine were in direct contact so I cut it. Didn't need much and isn't enough to affect the function but I definitely would not drive it with the belly pan touching the collectors!
It was on there thread. Minor trimming of the lip that turns up, but it was far less then ARH, which looks to be a 3 x 5 inch portion on each side.
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Old 11-03-2012, 11:48 PM   #19
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I am told that the Stainless Steel Works, you don't have to cut the belly pan.

How about the Dynatech?
I find that very hard to beleive

Yes minimal
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Old 11-04-2012, 12:11 PM   #20
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I didn't have to trim my pan, but you can't buy the full length headers anymore Mandrel bend solutions was the brand.
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Old 11-04-2012, 01:19 PM   #21
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Putting headers on really never makes anything louder, it is a pinging sound that I hear that is different. That's on the outside.
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Old 11-05-2012, 07:50 AM   #22
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Putting headers on really never makes anything louder, it is a pinging sound that I hear that is different. That's on the outside.
You would be right if you were able to keep your stock cats, but in this case you can not so it does get louder out the back

The ARH Shorties retain the factory cats and will not be louder.

Ted.
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