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

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Old 03-07-2013, 09:34 PM   #1
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Contemplating Headers?

I am thinking about getting a set of Longtube headers. I don't want to mess up my daily driver though. Would I have any reliability issues if I bought a good quality set such as Kooks? If you have headers, do you ever regret getting them? Will they drastically reduce my mpg? Not a huge issue, but I like getting 22ish. Anything 20 or better will still be fine. Opinions welcome!

Oh yeah... Really good chance I am getting a tune headers or not. Need to wake up that L99!
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Old 03-07-2013, 09:48 PM   #2
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MPG ??? really ??? you have an 8 cylinder muscle car that you want to make faster. Put the headers on and enjoy. You should add a CAI while your at it. Air in air out and good tune is always a good move. Not a shot in hell you will regret it.
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Old 03-07-2013, 10:00 PM   #3
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Quote:
Originally Posted by 07Tundra View Post
I am thinking about getting a set of Longtube headers. I don't want to mess up my daily driver though. Would I have any reliability issues if I bought a good quality set such as Kooks? If you have headers, do you ever regret getting them? Will they drastically reduce my mpg? Not a huge issue, but I like getting 22ish. Anything 20 or better will still be fine. Opinions welcome!

Oh yeah... Really good chance I am getting a tune headers or not. Need to wake up that L99!
With a quality set of headers and a good tune you will not have any driveability or reliability issues. Any change in fuel economy will be due to you putting your foot deeper in the throttle so you can enjoy the improved sound and power.
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Old 03-07-2013, 10:05 PM   #4
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Originally Posted by Mchlgrrsn View Post
MPG ??? really ??? you have an 8 cylinder muscle car that you want to make faster. Put the headers on and enjoy. You should add a CAI while your at it. Air in air out and good tune is always a good move. Not a shot in hell you will regret it.
I should have stated that I already have a CAI intake that I love. I have also deleted my mufflers. May have to put a good cat back system on there if I decide on headers. I don't know if the radio will get quite loud enough! would still like to be able to talk to my wife....Some! Would i have good enough gains just adding the LT's with the stock cats and the resonator? Or would spending all that money on headers be useless without hi-flow cats?
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Old 03-07-2013, 10:09 PM   #5
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Originally Posted by 07Tundra View Post
I should have stated that I already have a CAI intake that I love. I have also deleted my mufflers. May have to put a good cat back system on there if I decide on headers. I don't know if the radio will get quite loud enough! would still like to be able to talk to my wife....Some! Would i have good enough gains just adding the LT's with the stock cats and the resonator? Or would spending all that money on headers be useless without hi-flow cats?
You can not use your stock cats with long tube headers. You have to either go with high flow cats or a cat delete. For the application you are describing I would not suggest cat deletes.
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Old 03-07-2013, 10:16 PM   #6
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Quote:
Originally Posted by 07Tundra View Post
I should have stated that I already have a CAI intake that I love. I have also deleted my mufflers. May have to put a good cat back system on there if I decide on headers. I don't know if the radio will get quite loud enough! would still like to be able to talk to my wife....Some! Would i have good enough gains just adding the LT's with the stock cats and the resonator? Or would spending all that money on headers be useless without hi-flow cats?

Yes you will need high flow cats. Not really an option
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Old 03-07-2013, 10:19 PM   #7
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You can not use your stock cats with long tube headers. You have to either go with high flow cats or a cat delete. For the application you are describing I would not suggest cat deletes.
Cat delete would work, but I would have to buy a catback exhaust right? Or would that still be too freakin loud? Would it hurt the reliability/longevity of my engine to run without cats? I used to have a LS1 Trans Am that would rumble my old girlfriends house! They could feel it when i pulled up! It was a beast. I want good clean sound with out breaking a bunch of noise ordinances! I am a huge fan of Flowmaster. I love their rumble so much every V8 I have every own had one. Best buds with the muffler shop guy helped. Held off for a while on my Tundra, but it now has a super 44 on it!
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Old 03-07-2013, 10:20 PM   #8
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Yes you will need high flow cats. Not really an option
What brand/combo do you suggest? 1 7/8 right?
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Old 03-07-2013, 10:31 PM   #9
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Originally Posted by 07Tundra View Post
Cat delete would work, but I would have to buy a catback exhaust right? Or would that still be too freakin loud? Would it hurt the reliability/longevity of my engine to run without cats? I used to have a LS1 Trans Am that would rumble my old girlfriends house! They could feel it when i pulled up! It was a beast. I want good clean sound with out breaking a bunch of noise ordinances! I am a huge fan of Flowmaster. I love their rumble so much every V8 I have every own had one. Best buds with the muffler shop guy helped. Held off for a while on my Tundra, but it now has a super 44 on it!
Whether you go with high flow cats of cat deletes has no bearing on what you mount behind it. Neither with require you to go with an aftermarket cat back. You just have to make sure you are buying a set of headers that utilizes the factory connection points (sometime called a "short system", not the same thing as short tube headers). Without cats it will be louder and you will get the rotten egg smell. Wives tend to not like that.
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Old 03-07-2013, 10:33 PM   #10
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Put mufflers on and high flow cats or else you wont b avle to talk
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Old 03-07-2013, 10:43 PM   #11
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You mentioned you didn't want it too loud. Kooks sells a complete exhaust system. You should get something with mufflers. I like kooks very much. As far as size goes, I like 3 inch inlet to a 2.5 outlet no cats and 2.5 the rest of the way out.
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Old 03-07-2013, 10:50 PM   #12
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Ive got 1 3/4 JBA LTs on mine, get 22+ on the interstate and gained over 30rwhp. Drive it everyday.
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Old 03-07-2013, 10:59 PM   #13
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Originally Posted by Mchlgrrsn View Post
MPG ??? really ??? you have an 8 cylinder muscle car that you want to make faster. Put the headers on and enjoy. You should add a CAI while your at it. Air in air out and good tune is always a good move. Not a shot in hell you will regret it.
I like this guy!!!! You sound like my twin around here!

OP go with a 1 7/8's header I have the kooks on both my cars and since its your DD get them coated. I got mine thru Maryland speed they are sponsors here and have free shipping. Cats are pointless to me really but up to you. But pleeeease don't come here worried about MPG's or Warrantys because those are for Honduh's, Camrys and Subaloosers! Got on the mod train and get it started for the spring!!!
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Old 03-07-2013, 11:06 PM   #14
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Quote:
Originally Posted by 07Tundra View Post
I am thinking about getting a set of Longtube headers. I don't want to mess up my daily driver though. Would I have any reliability issues if I bought a good quality set such as Kooks? If you have headers, do you ever regret getting them? Will they drastically reduce my mpg? Not a huge issue, but I like getting 22ish. Anything 20 or better will still be fine. Opinions welcome!

Oh yeah... Really good chance I am getting a tune headers or not. Need to wake up that L99!

Adding headers will lower your mpg for sure especially if you don't get a proper tune. If you have already done a muffler delete and you don't want to wake the neighbors you'll need a catback. If you plan on having your wife in the car you might want a milder catback system to go with a set of long tubes.
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Old 03-08-2013, 01:41 AM   #15
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been driving around the past 4 tanks of gas 450 hp to the wheels with kooks longtubes and cats, cai inc intake, custom grind vvt cam and headwork done by west coast heads and my DIC reads 20.1 mpg....thats half city 25% freeway cruise and 25% freeway stop and go bumper to bumper.....aaaaannnnddd with me putting my foot in it to feel my new car..if your worried about gas mileage dont be a proper tune with a proper setup will be fine
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Old 03-08-2013, 02:14 AM   #16
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Umm.... my MPG went up when I had a tune, CAI, LT header combo and that was with AFM/DOD turned off. Not that it was important to me with this car. If your worried about mpg's dont because with the right tune it will stay the same or get better. Same goes for the reliability. All 5th gen Camaro's should have come from the factory this way IMO. Especially the L99's.
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Old 03-08-2013, 02:17 AM   #17
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My MPG went down, but I can't say for sure if it was because of the mod. I put my foot down more so there has not been fair testing. When I can test while keeping my foot out of it I will let you know.

I went with the ARH headers and they are amazing. Can't go wrong with any of the headers available for the most part though. If you are getting a tune either way, might as well throw the headers in too.
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Old 03-08-2013, 01:47 PM   #18
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Quote:
Originally Posted by 07Tundra View Post
I am thinking about getting a set of Longtube headers. I don't want to mess up my daily driver though. Would I have any reliability issues if I bought a good quality set such as Kooks? If you have headers, do you ever regret getting them? Will they drastically reduce my mpg? Not a huge issue, but I like getting 22ish. Anything 20 or better will still be fine. Opinions welcome!

Oh yeah... Really good chance I am getting a tune headers or not. Need to wake up that L99!
There are no reliability issues with LT headers as long as they are installed correctly. I definitely recommend getting quality headers such as KOOKS. We use and instal KOOKS headers on 90% of our shop projects as their fit and finish is second to none.

As for MPG, you can actually get slightly better mileage if you keep your foot out of it. But as most state, the new found power tends to cause your foot to be heavier.

As for the cats, We recommend going with the HFC (high flow cats) option because catless exhaust systems tend to be raspy and stink.. Plus there is only a mild 1-2 HP difference between HFC's and catless..

We have awesome specials going right now on KOOKS products. Please feel free to call, PM or email me anytime with questions or pricing.

Best regards,

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Old 03-08-2013, 03:13 PM   #19
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LT's+JRE tune =

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Old 03-08-2013, 04:08 PM   #20
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My MPG went down, but I can't say for sure if it was because of the mod. I put my foot down more so there has not been fair testing. When I can test while keeping my foot out of it I will let you know.

I went with the ARH headers and they are amazing. Can't go wrong with any of the headers available for the most part though. If you are getting a tune either way, might as well throw the headers in too.
This.

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Old 03-08-2013, 09:43 PM   #21
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I should have stated that I already have a CAI intake that I love. I have also deleted my mufflers. May have to put a good cat back system on there if I decide on headers. I don't know if the radio will get quite loud enough! would still like to be able to talk to my wife....Some! Would i have good enough gains just adding the LT's with the stock cats and the resonator? Or would spending all that money on headers be useless without hi-flow cats?
You cannot use stock cats with long tube headers. The length of the "long" tubes end the header far past the location of the stock cats - they just will not fit. Get the high flow cats with your headers. With your tune (get that from JRE by the way) you will get a nice performance AND sound improvement. Since you have already deleted the mufflers, I suggest just run it like that for a while and see if you like the way it sounds. If you don't, there are many options to change the sound. Just keep in mind that the money you spend on exhaust systems at that point will be for sound only. You are doing the right thing by starting with the headers. It will save you money in the long run.
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Old 03-25-2013, 06:35 PM   #22
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1 7/8" headers and magnaflow part# 16483 is the best mod for these cars. PERIOD. I was in love after that. No daily driver issues either.
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Old 03-25-2013, 09:51 PM   #23
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1 7/8" headers and magnaflow part# 16483 is the best mod for these cars. PERIOD. I was in love after that. No daily driver issues either.
I have SW LT's , no cats and this catback. Nice at idle, low RPM's and just daily driving. Very loud and raspy at WOT.

I like it though.
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Old 03-26-2013, 12:10 PM   #24
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I purchased the JBA Stainless and Ceramic coated Long Tubes and they have been great and the price did not kill me. I did have a tune done and I went up in MPG when I can keep my foot out of it.

Link to JBA LT's.
http://www.camaro5.com/forums/showth...highlight=jba*

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Old 03-26-2013, 12:14 PM   #25
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Headers, cats or no cats, you will be fine as long as you get a good tune.
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