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

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Old 01-19-2012, 10:17 PM   #1
EncoreCamaros
 
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Header questions

I bought AR headers 1 7/8 short system with cats about 8 months ago and im planning on supercharging the car in the spring. I dont want to deal with any problems with the cats so i want to put straight pipes and swap the 2 1/2" system to a full 3" system back to stock mufflers. Is there anything difference with the collecters to connect the staight pipes to? Or do they slide and clamp on like the cats? And what it would cost ?
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Old 01-19-2012, 10:23 PM   #2
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Leave your cats alone. This is getting pretty crazy...people gutting and removing perfectly fine cats for no reason. If a cat is going bad..you will know...you would have to be brain dead to drive the car long enough for a defective cat to damage the car.
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Old 01-19-2012, 10:33 PM   #3
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Alright so if i leave the cats alone, i still want to run 3" full system with an x-pipe to the stock mufflers
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Old 01-20-2012, 12:34 AM   #4
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Lose your cats...we've been deleting cats for years with POSITIVE results.

Just make sure you won't get jammed up with emissions...

That's my $0.02
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Old 01-20-2012, 12:56 AM   #5
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Alright so if i leave the cats alone, i still want to run 3" full system with an x-pipe to the stock mufflers
So you want to add weight by adding those heavy cans. Why?

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Old 01-20-2012, 07:07 AM   #6
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Not putting them back on, i never took them off
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Old 01-20-2012, 08:42 AM   #7
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Not putting them back on, i never took them off
There is no point in running 3in exhaust to 2.5in mufflers. You gain absolutely nothing by doing so.
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Old 01-20-2012, 09:03 AM   #8
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There is no point in running 3in exhaust to 2.5in mufflers. You gain absolutely nothing by doing so.

What exactly do you mean by this...
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Old 01-20-2012, 09:10 AM   #9
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What exactly do you mean by this...
Probably because the pipes will have less restriction with 3" pipes coming out of the engine, just to be restricted again going through the mufflers.


You might as well get an aftermarket exhaust after doing all that.
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Old 01-20-2012, 09:27 AM   #10
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I was planning on getting the ARH Lt's with catted xpipe that runs to the borla s type axle back....the exhaust from headers back is 3" but the borla axle back is 2.5...is this a problem?
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Old 01-20-2012, 09:54 AM   #11
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I was planning on getting the ARH Lt's with catted xpipe that runs to the borla s type axle back....the exhaust from headers back is 3" but the borla axle back is 2.5...is this a problem?
I doubt it would be a problem. I was just guessing as to what "Axis" meant by his comment. Larger pipes = less restriction. After all that airflow going to the mufflers, I doubt the 2.5 section of muffler will drop your gains considerably. A 3" muffler would help, but why spend the money if you've already got Borla? I'm no expert though, I could be wrong.
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Old 01-20-2012, 10:02 AM   #12
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SOrry to steal the thread, but I don't have the borla yet. It says on the site that the axle back is 2.5", but maybe it can be ordered as a 3". Here is what the ARH item description says: The exhaust system is all 3" and extends to the rear axle where it reduces to 2-1/2" I.D. and mates to the factory exhaust.
maybe someone can chime in on this theory?
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Old 01-20-2012, 10:39 AM   #13
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EncoreCamaro, Please PM me a phone number and I'll call you with all the various options we offer. I have questions regarding which supercharger you'll be running and how much power you're ultimately after. You can replace the the catted connection pipes to off road but it may be a waste of time depending what your performance goals are. Our cats can handle tremendous punishment but even they have their limitations. Get back to me when you can. It may be quicker if you can call me at 631-608-1986. Either way I'll get you on the right track. Thanks.

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Old 01-20-2012, 11:02 AM   #14
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SOrry to steal the thread, but I don't have the borla yet. It says on the site that the axle back is 2.5", but maybe it can be ordered as a 3". Here is what the ARH item description says: The exhaust system is all 3" and extends to the rear axle where it reduces to 2-1/2" I.D. and mates to the factory exhaust.
maybe someone can chime in on this theory?
ARH/ Farks Supers cars 2010 Camaro, Full American Racing Headers exhaust reduced to 2-1/2" after the rear axle. Take a listen and let us know what you think.

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Old 01-20-2012, 11:10 AM   #15
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Sounds like a monster :O
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Old 01-20-2012, 11:39 AM   #16
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Sounds good Nick
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Old 01-21-2012, 09:21 AM   #17
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What exactly do you mean by this...
You can have 5in pipes going all the way back but if you have it choked down to 2.5in at the end of the system, you're not going to flow any more than if there was 2.5in all the way back. It's debateable but it could possibly even hurt flow. Exhaust flow works on pulses that pull the exhaust through the system. Upsetting those pulses can have a positive or negative affect depending on how it upsets them. If you're wanting to upgrade to a 3in axleback in the near future, I can see the reasoning behind going with 3in mid piping now. What is your reasoning behind wanting to go 3in mid pipes back to 2.5in mufflers?
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Old 01-21-2012, 11:42 AM   #18
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Problem is solved. Let's just say I will be running a full 3" exhaust in a few weeks.
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Old 01-21-2012, 11:47 AM   #19
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I put on Ceramic Coated Pacesetter L/T Headers with Magnaflow 4600 series cats. 3 inch pipes into Flowmaster S-10's and my sound is incredible. Borla cracks to much and I had it tuned even though I didnt need it to see if my HP increased and it did slightly but the sound is old school...there are so many exhaust systems out there but I had this done for about 1100.00 installed and new tipped.
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