Catted vs. Catless headers for sound

[Coyotes55086]

Hey guys, just wondering for you guys who have catted headers, when you got the high flow catted headers over stock, did they make the car a lot louder? How much louder are catless headers from catted?

Is there a very big noticeable difference from one to the other? I would like to increase the sound of the engine, however I don't want to void my warranty with catless headers

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[BmacIL]

Hey guys, just wondering for you guys who have catted headers, when you got the high flow catted headers over stock, did they make the car a lot louder? How much louder are catless headers from catted?

Is there a very big noticeable difference from one to the other? I would like to increase the sound of the engine, however I don't want to void my warranty with catless headers

Both are significantly louder. The high flow cats available for most headers don't go a lot for volume, but control rasp some.

If you don't want to have a warranty issue, don't do significant power mods. Buy a louder catback exhaust. The AWE Touring, Corsa Xtreme and Borla ATAK are all very loud.

 

[Meraki Autoworks]

Yes catted is still a lot louder. Both sound great though.. Get an exhaust first to start off, should be plenty loud for the time being..

We ship to Canada, we can get you pricing on Borla, Kooks, AWE Tuning, Corsa, Stainless Works, etc..

-Josh

 

[3star2nr]

Hey guys, just wondering for you guys who have catted headers, when you got the high flow catted headers over stock, did they make the car a lot louder? How much louder are catless headers from catted?

Is there a very big noticeable difference from one to the other? I would like to increase the sound of the engine, however I don't want to void my warranty with catless headers

ALL headers will void your warranty...

 

[Stephen@lethal]

If you're in an emissions state, stay with a high flow catted setup, there won't be a significant difference power for you. In terms of sound, both will sound great with catless only being slightly louder. Hit me up and I can take care of you on any exhaust setup.

 

[Ebm]

There's only a few decibel difference between high-flow cats and no cats. You get high-flow cats to help pass emissions and clean up the smell a bit. Like said above, they don't last nearly as long as your stock cats.

 

[Coyotes55086]

In Canada we don't have emissions testing anymore. But I was told that catless headers with void my warranty. They did say that I could do headers though in that that wouldn't affect my warranty apparently. So I have to go high flow catted.

 

[Ebm]

In Canada we don't have emissions testing anymore. But I was told that catless headers with void my warranty. They did say that I could do headers though in that that wouldn't affect my warranty apparently. So I have to go high flow catted.

Headers won't void your warranty? Dang, Canada is the place to be for a car enthusiast then. You better get that in writing though. Something said verbally isn't worth a hill of beans.

 

[BmacIL]

In Canada we don't have emissions testing anymore. But I was told that catless headers with void my warranty. They did say that I could do headers though in that that wouldn't affect my warranty apparently. So I have to go high flow catted.

I wouldn't believe that for a second. Honestly, just get a loud catback and be done. Headers are expensive, total PITA to install and require a tune, even catted (which also puts your warranty into jeopardy)

 

[Coyotes55086]

Maybe you guys are right. Maybe I should just forget about the headers right now

 

[Avispa]

You want sound? Just do a cat back exhaust. Getting rid of a magna flow comp cat back BC its too loud. Don't take the cats off. Your exhaust will smell a lot worse than it does now and you'll choke in the garage. Spend an hour or so behind my 66 corvette and you'll see what I mean. You can smell catless car exhaust a few cars back.

 

[Zelek]

Those high flow cats don't help you pass emissions one bit. The only thing they may help you with is a visual inspection. That's it. This is coming from someone who has both catted and catless lead pipes to my ARH headers.

 

[V8EATR]

Those high flow cats don't help you pass emissions one bit. The only thing they may help you with is a visual inspection. That's it. This is coming from someone who has both catted and catless lead pipes to my ARH headers.

I have catless ARH now and I'm wanting to add cats. Mostly due to rasp/drone but also maybe a little bit of volume reduction. Was there a noticeable difference with the cats?

 

[5.0_SD]

I have the AWE Touring catback and it is a head turner from my experience. I am not kidding when I say that on a daily basis I will see heads turn when I go by at anything above 3K rpm. If its just sound you want, all you need is a decent catback. @BmacIL is right in that LTH's don't give much versus what a PITA they are to install. The only way I will do headers is if I go supercharger and even then, the supercharger install will be easier than the header install, just takes longer (maybe).

 

[BmacIL]

I have the AWE Touring catback and it is a head turner from my experience. I am not kidding when I say that on a daily basis I will see heads turn when I go by at anything above 3K rpm. If its just sound you want, all you need is a decent catback. @BmacIL is right in that LTH's don't give much versus what a PITA they are to install. The only way I will do headers is if I go supercharger and even then, the supercharger install will be easier than the header install, just takes longer (maybe).

I recently installed the AWE touring axleback with an X-pipe and it is definitely the loudest thing I've had (louder than Corsa Xtreme and Borla ATAK). The other day I swapped the X for the Borla resonator, which is a resonated H-pipe, and it's much calmer. I might try to do a regular H-pipe with bottles resonators like AWE has on their catback, essentially making a 2.5" version.

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