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Camaro V6 LFX Engine, Exhaust, and Bolt-Ons For all LFX related parts

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Old 07-10-2013, 09:46 AM   #1
meissen
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ATTENTION: No, your 2012+ Camaro LFX (LS, LT models) cannot have headers!

Since this seems to be a recurring topic in the LFX section by folks new to the 2012+ 3.6L LFX engine, I figured we should compile a single thread and hopefully get it stickied so it's easier to find and reference.

With the release of the 3.6L v6 named "LFX" in the 2012 Camaro LS and LT models, General Motors released an engine with a radical new head design: the exhaust manifold is integrated into the heads. This means that you cannot "install" headers on an LFX engine. Additionally, the 2012+ LFX engine uses a composite intake manifold instead of the metal previously used.



While the knee jerk reaction is "I WANT HEADERS!" - as a new owner to a vehicle with an LFX engine, you'll soon realize the advantages outweigh the negatives. For starters, the LFX engine is 20 pounds lighter than the previous 3.6L LLT engine used in the 2010 and 2011 Camaro LS and LT models. The composite intake manifold combined with the integrated exhaust manifold allowed GM to shed weight from the engine. The composite intake manifold helps to reduce heat soak, so while guys with LLT engines need to add spacers to isolate their intake manifold from the engine block to minimize heat soak, we (LFX owners) do not have to! Additionally, the LFX engine makes 11 horsepower more than the LLT. One other thing to mention would be that the MAF was changed from LLT to LFX so you cannot use a cold air intake designed for a 2010-2011 Camaro unless the manufacturer specifically states it will work on a 2012+ Camaro.

While it may be unfortunate that we can't get the exhaust tone that normally comes with a set of headers, consider it a savings to your wallet - focus your attention to the true bottle necks on the LFX engine -- the catalytic converter and muffler. Buy a nice set of high flow cats and a new exhaust (axle back or cat back) and you're done with the exhaust.

For more information on the LFX engine, check out the communication from GM:
http://media.gm.com/media/us/en/chev...ro_engine.html




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Last edited by meissen; 07-11-2013 at 08:32 PM.
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Old 07-10-2013, 09:57 AM   #2
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If anyone has any changes or additional items they want added, please feel free to post and I can revise the first post.


Could a mod sticky this? I think having this clearly defined in the title and having it be a sticky would help cutdown on a lot of the repeat threads.
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Old 07-10-2013, 10:10 AM   #3
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Old 07-10-2013, 10:10 AM   #4
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Good post....but what if I use duct tape? :-)
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Old 07-10-2013, 12:33 PM   #5
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maybe add there's no need for an isolator because the IM is now some type of non-heat-conductive plastic.
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Old 07-10-2013, 01:20 PM   #6
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Now just have a mod make it a sticky
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Old 07-10-2013, 03:38 PM   #7
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great post.

I'm also sick of all the threads people start about what exhaust to get.
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Old 07-10-2013, 03:49 PM   #8
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Good post! Sticky for sure!

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Old 07-10-2013, 05:36 PM   #9
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So wait.... I can't have headers? Lol

Sorry, couldn't resist.
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Old 07-10-2013, 05:42 PM   #10
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Great idea, I had to send an e-mail to one vendor on here that listed headers fitting the 2012 and 2013 Camaro V6.
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Old 07-10-2013, 05:50 PM   #11
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Someone needs to make this a sticky in this forum.
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Old 07-10-2013, 09:17 PM   #12
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Good post

Most of them know that they cannot install headers on LFX. Now they will know why they cannot
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Old 07-10-2013, 09:28 PM   #13
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Huzzah!
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Old 07-11-2013, 08:22 AM   #14
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What, no headers. Why not.

J/K
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Old 07-11-2013, 08:33 AM   #15
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Quote:
Originally Posted by The Stig View Post
Huzzah!
Thank you sir!




If anyone has any changes they'd like to see pointed out in the OP (I already have in the OP that there's no need for the spacer/isolator because of the composite intake manifold), please feel free to post and I can incorporate it in. The goal of the OP is to be as informative as possible.
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Old 07-11-2013, 08:52 AM   #16
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Sooooo BBK or Flowmaster for my LFX? I cant decide LMAO
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Old 07-11-2013, 09:47 AM   #17
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maybe add that the 2010 2011 intakes are not compatible also.
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Old 07-11-2013, 09:12 PM   #18
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The stock exhaust flows pretty well all the way out. I have the IPF S/C and haven't changed a thing.

Sure, you can add Solo high flow cats, but I'm skeptical of their long-term durability.

Any axle back exhaust is for sound and to shed weight. No one has shown me any gains other than that.

Just my opinion.

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Old 07-11-2013, 09:22 PM   #19
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Meissen, nicely done! About time, thanks!

Look at it this way, LFXer's, we already have the power advantage of aftermarket headers, stock!
Quote:
Originally Posted by JohnnyBfromPeoria View Post
Any axle back exhaust is for sound and to shed weight. No one has shown me any gains other than that.

Just my opinion.

John B.
I agree with your opinion.

Now if we could just get a sticky about the differences between the 2LS and the rest of the V6s...
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Old 07-11-2013, 11:39 PM   #20
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Excellent post... Now if only people will read it :P
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Old 07-12-2013, 08:22 AM   #21
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Meissen, nicely done! About time, thanks!

Look at it this way, LFXer's, we already have the power advantage of aftermarket headers, stock!

I agree with your opinion.

Now if we could just get a sticky about the differences between the 2LS and the rest of the V6s...
1LS = manual transmission

2LS = automatic transmission
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Old 07-12-2013, 08:29 AM   #22
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1LS = manual transmission

2LS = automatic transmission
2LS has a economy rear gear ratio too so it can achieve the 30 mpg Highway EPA rating.
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Old 07-12-2013, 08:42 AM   #23
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Quote:
Originally Posted by The Stig View Post
1LS = manual transmission

2LS = automatic transmission
I am aware of the differences--and there are more than just auto vs. manual.

Many others are not, and didn't find out until after their purchase, as Chevy does not make it clear and dealers/salespeople are generally clueless about it.

Our own Wiki here on Camaro5 says virtually nothing about it, which is frustrating to me, as this site should be THE resource for this kind of info, IMO.
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Old 07-12-2013, 08:43 AM   #24
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Quote:
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2LS has a economy rear gear ratio too so it can achieve the 30 mpg Highway EPA rating.
True, and there are more differences beyond that as well.
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Old 07-12-2013, 09:27 AM   #25
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Waiting for more random info.
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