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

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Old 05-14-2013, 02:38 PM   #1
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Headers with out a tune

Looking at getting headers and high flow cats soon (2011 L99 borla atak catback) leaning towards kooks long tubes.. Any of you members out there running headers and cats with out a tune?
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Old 05-14-2013, 02:43 PM   #2
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Kooks is the only one that offers a LT/Cat package that supposedly does not require a tune due to the "green" option cats. otherwise it will pop a O2 sensor code sooner or later.

without a tune though you wont get the full benefit of the upgrade though.
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Old 05-14-2013, 02:46 PM   #3
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I've got long tubes and don't have a tune and cel is on.
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Old 05-14-2013, 02:54 PM   #4
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I've got long tubes and don't have a tune and cel is on.

What is the throwing up the cel the lack of o2 sensors?
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Old 05-14-2013, 02:55 PM   #5
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Quote:
Originally Posted by mckeen723 View Post
Looking at getting headers and high flow cats soon (2011 L99 borla atak catback) leaning towards kooks long tubes.. Any of you members out there running headers and cats with out a tune?
As of yesterday, I am running coated Kooks 1-7/8" headers and cats (not the green ones) without a tune. I plan on getting a remote tune done in the next few days but, as of now; no CELs so far. However, based on everything I have read, a CEL is just a matter of time without a tune.

Running headers and cats without a tune will not hurt the car but 1) you won't get the full benefit of better exhaust flow without a tune and 2) you will eventually get a CEL and/or other codes.
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Old 05-14-2013, 02:56 PM   #6
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What is the throwing up the cel the lack of o2 sensors?
I don't have cats.
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Old 05-14-2013, 03:02 PM   #7
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this I don't get.. with as high flowing and light as cats have gotten there is literally no reason not to have them anymore unless it's a track only trailer car.
people swear I have gutted cats or none at all but they are there and car is fully legal.

with today's tech you can now have power and be responsible too.
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Old 05-14-2013, 03:03 PM   #8
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this I don't get.. with as high flowing and light as cats have gotten there is literally no reason not to have them anymore unless it's a track only trailer car.
people swear I have gutted cats or none at all but they are there and car is fully legal.

with today's tech you can now have power and be responsible too.
i think the price of cats is what usually turns people off, IMHO
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Old 05-14-2013, 03:03 PM   #9
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My main reason for not wanting a tune was powertrain warranty issues, but I guess it might not be an issues if its just to tune for the headers as they would have to prove any problems were from they tune itself
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Old 05-14-2013, 03:12 PM   #10
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Quote:
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this I don't get.. with as high flowing and light as cats have gotten there is literally no reason not to have them anymore unless it's a track only trailer car.
people swear I have gutted cats or none at all but they are there and car is fully legal.

with today's tech you can now have power and be responsible too.
In addition to cost, supercharging is a good reason to go catless.
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Old 05-14-2013, 03:14 PM   #11
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AFM is gonna suck big time with headers.
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Old 05-14-2013, 03:16 PM   #12
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AFM is gonna suck big time with headers.

Range V8 took care of the AFM
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Old 05-14-2013, 03:18 PM   #13
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In addition to cost, supercharging is a good reason to go catless.
Um SC cars still pollute...
and ZL1s and ZR1s still have cats..
cost? was very little difference with the SW system.

/boggle.
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Old 05-14-2013, 03:19 PM   #14
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In addition to cost, supercharging is a good reason to go catless.
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Old 05-14-2013, 03:28 PM   #15
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Um SC cars still pollute...
and ZL1s and ZR1s still have cats..
cost? was very little difference with the SW system.

/boggle.
http://www.camaro5.com/forums/showthread.php?t=183230

http://www.camaro5.com/forums/showthread.php?t=269253 (post #8)

http://www.camaro5.com/forums/showthread.php?t=267204

There are tons of examples. Superchargers melt HF cats.
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Old 05-14-2013, 03:44 PM   #16
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Yep. Vehicles that are boosted with a good tune eat cats over time.
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Old 05-14-2013, 03:50 PM   #17
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Um it is still illegal.. don't care if you eat them or not.

I'm sorry I'm all for performance and HP. but excessively polluting because you are too cheap or because boost will chew them up is not a valid reason.
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Old 05-14-2013, 04:05 PM   #18
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Um it is still illegal.. don't care if you eat them or not.

I'm sorry I'm all for performance and HP. but excessively polluting because you are too cheap or because boost will chew them up is not a valid reason.
Personal preference? Your 510HP motor drinks gas faster than a Honda. You don't feel bad for driving a gas guzzler? You're depleting natural resources rapidly
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Old 05-14-2013, 04:09 PM   #19
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Your polluting turning a Camaro SS with a 6.2 L/376ci motor, I love pulling up next to a Prius with my cutouts open and 22* of catless overlap on a nice HOT azz day in humid shitcago.

L99 has NO cats, the blown GTO has NO cats, and I sleep well and love the fumes.


Op if you want headers and can deal with the CEL light on and the horrible sound when DOD kicks in then just run them. If not just tune it! I tuned mine back in 2010 just 10? Weeks after delivery and I haven't had a problem.
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Old 05-14-2013, 04:13 PM   #20
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Um it is still illegal.. don't care if you eat them or not.

I'm sorry I'm all for performance and HP. but excessively polluting because you are too cheap or because boost will chew them up is not a valid reason.
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Old 05-14-2013, 04:15 PM   #21
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Cats are ineffective until they heat up too. My drive to work is 2 minutes long. My factory cats haven't done sh!t for the environment for 75% of all the miles on the car.

You get headers, and you've moved them even further down the exhaust stream. They say 5 minutes on a typical car before the cat is at operating temp. It would be even longer with headers + HF cats.

I'm not worried about the EPA prosecuting me for something that is perfectly legal in my state.
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Old 05-14-2013, 04:16 PM   #22
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Yep. If you really car for the environment you would be driving a Prius. I too feel that today's cat technology has caught up to the performance levels of today but most high flow cats still throw codes and most feel what's the point. I also feel that today's v8s make less hydrocarbons uncatted vs catted v8s of 20 years ago. Now, if you go with a can with any amount of lope you pollute even more. This website is full of members that don't give a rats a$$ when it comes to cats or no cats. I feel that if you don't care then at least get a proper tune and keep the vehicle well maintained.
Back on subject of the op now.
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Old 05-14-2013, 04:21 PM   #23
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Quote:
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AFM is gonna suck big time with headers.
^^^^YES IT DOES. After the awesome sound of LTs, AFM was the second thing I noticed. You can really tell when it kicks in with headers. That's why I am just parking it until I get my tune in a couple of days. I am not knocking on the Range device. I just want to get the most out of the headers. Can't wait!!
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Old 05-14-2013, 04:25 PM   #24
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I couldn't give a shit about my pollution when there are countries that only burn leaded gasoline. Fix their pollution before you come after mine.
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Old 05-14-2013, 04:30 PM   #25
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In other news! Lol

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