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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-01-2013, 03:43 PM   #1
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Difference Between Headers And Open Headers?

If i am correct, i think open headers are just headers with no cats? Which voids warranty. Which sound better with the JBA Cat back? I know open headers is a lot louder but does it make it sound worst? Also there is no emission where I live.
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Old 06-01-2013, 03:56 PM   #2
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Open headers is headers with no exhaust pipe behind them...
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Old 06-01-2013, 04:01 PM   #3
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Would headers with an electrical cut out be considered "open"?
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Old 06-01-2013, 04:06 PM   #4
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Open headers is headers with no exhaust pipe behind them...
This. Like a race car.

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Would headers with an electrical cut out be considered "open"?
When they are open, yes.
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Old 06-01-2013, 04:07 PM   #5
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Does someone have a picture of the underside to explain more because I don't understand.
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Old 06-01-2013, 04:10 PM   #6
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Does someone have a picture of the underside to explain more because I don't understand.
Open headers

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Old 06-01-2013, 04:12 PM   #7
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This. Like a race car.



When they are open, yes.

Thank you for the quick response. I was considering an electrical cut out so I could keep my cats and thus pass smog if need be but still get the performance gain and sound of open headers when I want them. Do you think I am on the right track with that idea or have any better insight?
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Old 06-01-2013, 04:14 PM   #8
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So open headers are no cats and sound a lot louder and better?
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Old 06-01-2013, 04:17 PM   #9
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So open headers are no cats and sound a lot louder and better?
Not exactly. Open headers are no cats and no exhaust - and they're also stupid loud.
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Old 06-01-2013, 04:17 PM   #10
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Headers and no cats is pretty dang loud

Not a now, but before next May I'm getting cut outs, no doubt in my mind
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Old 06-01-2013, 04:18 PM   #11
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Better is all in personal preference. But yes they are a lot louder and do provide better exhaust flow.

A personal experience of mine in my roommates 02 trans am with a mechanical cut out (same as open headers) led me to like the sound in small doses. That's one reason a electric cut out has me interested since you can flip a switch and quiet her down. That experience also taught me that Nissans, Infinitis, BMW's, and Fords have more sensative car alarms than other companies.....
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Old 06-01-2013, 04:20 PM   #12
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Ok so I am not doing open headers. I want to Put the JBA catback with headers
Will this setup turn on the check engine light?
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Old 06-01-2013, 04:26 PM   #13
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Ok so I am not doing open headers. I want to Put the JBA catback with headers
Will this setup turn on the check engine light?
Yes, you will need a tune if you go for headers. The cat back by itself would not give you a CEL. There are a lot of threads with all the info you need in these forums.


And before you ask, YES a tune and headers will void your warranty but a cat back shouldn't
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Old 06-01-2013, 04:30 PM   #14
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Better is all in personal preference. But yes they are a lot louder and do provide better exhaust flow.

A personal experience of mine in my roommates 02 trans am with a mechanical cut out (same as open headers) led me to like the sound in small doses. That's one reason a electric cut out has me interested since you can flip a switch and quiet her down. That experience also taught me that Nissans, Infinitis, BMW's, and Fords have more sensative car alarms than other companies.....
Tell me about it - it's even worse when you park in an underground parking garage.
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Old 06-01-2013, 04:32 PM   #15
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Tell me about it - it's even worse when you park in an underground parking garage.
I was doing a canyon drive out here in that Trans Am and I went through a mid size tunnel and a pedestrian in the tunnel grabbed his ears and had an expression of physical pain on his face.
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Old 06-01-2013, 07:02 PM   #16
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Ok so I am not doing open headers. I want to Put the JBA catback with headers
Will this setup turn on the check engine light?
Just installed this setup. JBA headers and HF cats with 3" exhaust. Been driving it for 3 days now with no CEL and or codes?
I was under the assumption it would throw a code also? Any thoughts?
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Old 06-01-2013, 10:01 PM   #17
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Just installed this setup. JBA headers and HF cats with 3" exhaust. Been driving it for 3 days now with no CEL and or codes?
I was under the assumption it would throw a code also? Any thoughts?
How much did this setup cost you total without labor? Also is it extremely loud one guy told me it shakes the walls in his garage.
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Old 06-01-2013, 10:15 PM   #18
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Just installed this setup. JBA headers and HF cats with 3" exhaust. Been driving it for 3 days now with no CEL and or codes?
I was under the assumption it would throw a code also? Any thoughts?
Long tube headers or shorty headers?
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Old 06-02-2013, 12:06 AM   #19
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Ya
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Old 06-02-2013, 05:35 AM   #20
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Long tube headers or shorty headers?
Long tubes. Yeah, I know the shorties may not necessarily throw a code.
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Old 06-02-2013, 06:02 AM   #21
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No emissions opens the door to an endless array of possibilities and combinations. If you're worried about warranty maybe look at JBA shorties and JBA HF cats then put the cut-outs just behind the cats where they connect to the cat-back section.

Where there's a will there's a way.
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Old 06-02-2013, 08:58 AM   #22
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Kids you just cant understand..........You do not need nor particularly want cut outs as unless you are racing it...you should not be using it as its illegal....and has a 100% chance of shooting a little flame throwing out of the pipes form unburned gasoline that close to the headers and then mo0st tracks dont want you burning up the starting line..........And if the cut out is headed off to the side insead of down you can add a extra pipe onto it to make it come out the side as is the case of a lot of old hot rods if you have ever even beem to a old car show and noticed block off plates on the side of cars with exposed side pipes...........Then put two and two together...you do want it exiting the car on the side as if its under the car....car has a much better chance of going "poof" from leaking solvents like gas or oil or build up from driving over fresh asphalt oils or even yes undercoating. Let alone the fact cops would love you the second you open it up as they could hear you very far away......Believe me the least I could get away with on my old rods many that i built with headers was to have glas pack or cyclonic mufflers dumping out to monza tips as I had 2 1/2 inch or 3 inch exhaust and got tired of getting pulled over eventually and put monza tips on which left it with a mild tweetering chirping out their little resonators. Also as I always tell everyone...No mufflers is illegal as hell, muffler delete is not a option and not a mod and most shops will not perform it as also a cat delete......When and if you are ever cited from being pulled over you will have to prove in court you have reinstalled the mufflers....or maybe in your case removed the cut out if the judge is any kind of judge. SO be smart, making noise is a citation if not properly equipping a car...............I know I am a old hot rodder who works for law enforcement
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Old 06-02-2013, 12:20 PM   #23
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installed kooks 17/8 long tubes with high flow cats and corsa catback exhaust, it took about 6 days to throw a code. i reset and the code came back 4 days later. had T n T Performance tune the car and no more codes.
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Old 06-02-2013, 03:27 PM   #24
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Well I'll have no warranty so that's fine. Also how much does it cost just to tune out the check engine light?
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Old 06-02-2013, 03:32 PM   #25
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LOL Stig! That differential is on the wrong axle in your open header pic! (I know, 4x4) but yes, open headers w/out the proper big cam and big valve heads tuned for it will not give more HP, just loud noise and unsafe around anything combustible.

A certain amount of backpressure is needed for low end torque.

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