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Old 11-16-2009, 07:45 PM   #1
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2" Headers Vs 1 7/8" Headers...Your Opinions PLEASE!!!!!

I am currently in the process of purchasing an exhaust system for my Baby. I want to get this right the first time. I have the choice between 2" Long Tube headers or 1 7/8" long tube headers. Both are exactly the same price and fitment of each is not a problem.

What are the advantages or disadvantages please????

My future mods, besides exhaust and CAI, may include a cam and super charger or maybe even a pro charger.

I'm under the impression that the bigger the tubes the more air pushed out.....and You know the rest.

Probably no big difference between the two but wanted to solicit several opinions before I pull the trigger. Your advice is very much appreciated.
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Old 11-16-2009, 08:08 PM   #2
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1 7/8th will be fine for you. Dyno's have shown that for NA engines 1 3/4 is best, but since you're going to be pushing more air through I'd go with 1 7/8th headers. Just remember that with boost applied you really won't get much hp out of headers, but your overall system will become more efficient. So it really doesn't matter too much. Just my 2 cents
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Old 11-16-2009, 08:20 PM   #3
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1 3/4 is all you need. With a 4000lb car you dont want big tube headers to take away the the low end torque.
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Old 11-16-2009, 08:26 PM   #4
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Quote:
Originally Posted by SShift View Post
1 3/4 is all you need. With a 4000lb car you dont want big tube headers to take away the the low end torque.
It is true if you was just doing exhaust and CAI. He said he may be doing a cam and super charger. At this point 1 3/4 starts becoming too restrictive.

OP, I would go with 1 7/8.
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Old 11-16-2009, 08:34 PM   #5
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I think it really comes down to where you want your power to be. The bigger the primary, the higher up in the rpm range your power will be. Of course, if you have too small a diameter on any part of your exhaust, you'll lose power anyway. Haven't seen a definitive dyno to prove where that cutoff is, but I suspect, you'd want 1 7/8 headers just to be sure.
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Old 11-16-2009, 08:34 PM   #6
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Definitely not 1 3/4. I would go 1 7/8 min. 2" are faily large and really need to consider what HP level you plan to achieve. Price difference is really negligible between them as well. Heck the 1 3/4 is the same as the 1 7/8 with ARH (American Racing Headers).

Oh and 1 7/8 actually dyno'ed better over 1 3/4 hp and tq on a stock LS3 motor. Call Nick @ ARH youself for the facts when choosing header size. Literally skip 1 3/4 period imo.

I have a set of ARH 1 7/8 with high flow cats and intermediate pipe ready to ship. PM for pricing.

Last edited by 2Tightwads; 11-16-2009 at 08:50 PM.
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Old 11-16-2009, 08:39 PM   #7
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So.... Are the 2" headers actually not a good choice whether or not I eventually add a cam and Or supercharger?? I guess I just remember the old days when "big tube headers" were the $#!t. Also kinda cool telling my mustang buddies they are 2" headers but not at the expense of robbing my power.
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Old 11-16-2009, 08:46 PM   #8
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Quote:
Originally Posted by SShift View Post
1 3/4 is all you need. With a 4000lb car you dont want big tube headers to take away the the low end torque.
I agree. We use the 1.875" on our 429 Alky Z06 with 13:1 compression, but when installed on a 427 without mods, the torque loss is felt.

The smaller 6.2 liter motor will do very well on the 1.75" headers.
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Old 11-16-2009, 08:48 PM   #9
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I am currently saving my pennies for future mods:

AirAid Intake
1 7/8 Kooks headers
Cam
Magnaflow 3 in. catback
50 shot Nitrous
Tune

If i was doing Intake, Supercharger/Turbo, Cam, Exhaust and Tune i would go 2in.
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Old 11-16-2009, 08:50 PM   #10
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Quote:
Originally Posted by Mr. Brownstone View Post
So.... Are the 2" headers actually not a good choice whether or not I eventually add a cam and Or supercharger?? I guess I just remember the old days when "big tube headers" were the $#!t. Also kinda cool telling my mustang buddies they are 2" headers but not at the expense of robbing my power.
You don't need 2" until you see 900hp+ level honestly but if you want 2" to be a baller, go for it! Even Nick @ ARH (The Owner) recommends 1 7/8 over 1 3/4 on stock 2010 Camaro's. Besides why have to sell your 1 3/4 headers for half price to someone used only to have to pay full retail again for the larger 1 7/8 down the road? Thats just stupid math right there...
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Old 11-16-2009, 08:52 PM   #11
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Quote:
Originally Posted by DarricSS View Post
I am currently saving my pennies for future mods:

AirAid Intake
1 7/8 Kooks headers
Cam
Magnaflow 3 in. catback
50 shot Nitrous
Tune

If i was doing Intake, Supercharger/Turbo, Cam, Exhaust and Tune i would go 2in.
Call me for a penny pinching deal on all those items. Might surprise yourself and be able to afford some of them right now!
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Old 11-16-2009, 08:54 PM   #12
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I was told today (as I to am shopping for a full exhaust) that if I was doing an exhaust and CAI, that the 1 7/8 would be fine. However if a Supercharger was in the future possibly then I would want the 2.....interesting enough is that the price of the 1 7/8 and 2 exhaust was the same...so go figure.

This thread may help me shed some light on the same question. However at this point if it were me, I would go 2 inch
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Old 11-16-2009, 09:00 PM   #13
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Call me for a penny pinching deal on all those items. Might surprise yourself and be able to afford some of them right now!
Like Chevy Chase in the movie Christmas Vacation depends on my "bonus"...

But will do when the time is right...
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Old 11-16-2009, 09:00 PM   #14
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Tell you what call god himself (Nick @ ARH) and ask him for his opinion, American Racing Headers 631-608-1986. Looks like everyone is taking advice as hearsay...I'm repeating what every manufacturer of headers for the 2010 Camaro has told me so far... ARH, Kooks, Dynatech, Ect. have told me the below from their own extensive testing. 1 7/8 is ALL you need sir. 2" is for practically RACE ONLY 900HP+.
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