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

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Old 06-26-2009, 08:29 AM   #1
pharmd
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Camaro L99 American Racing Headers (Catted) system with stock exhaust = +42rwhp

We dyno'd the SS last night after installing the American Racing (Catted) system with stock mufflers. For comparison, we used my BEST stock dyno run...I certainly "could" have picked my worst stock dyno to make the gains look better and if I were selling a product that probably would be smart, but I'm "keeping it real" so you know what it really did. (all numbers are SAE corrected, Same dyno for all pulls).

My best dyno stock was 321rwhp/332rwtq, by best with headers + tune was 350rwhp/370rwtq for gains of 29rwhp at peak/38rwtq at peak.

At its maximum gain over stock it picked up 42rwhp @ like 5300rpm and 42rwtq @ like 4200 rpm.

I will put some sounds clips up soon. It is as quiet as stock with the cruise set @ 80 mph, but it definitely wakes up at WOT.

On my auto we didn't see the 50rwhp/45rwtq that was claimed (which I assume was on a 6sp manual car). However, if you figure dyno variation, weather differences between stock and modded pulls, and the different amount of power gained between manual and auto, I think my numbers are in-line with the advertised claims.


ADDED: video of 0-60 run after mods:

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Old 06-26-2009, 08:37 AM   #2
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Well that should pick up your 1/4 mile times!!!
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Old 06-26-2009, 08:58 AM   #3
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How much does something like this cost?
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Old 06-26-2009, 02:16 PM   #4
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I'm not sure on the exact price but somewhere around $1850 + tune ($200-$400).
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Old 06-26-2009, 02:22 PM   #5
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42 rwhp gain and you're still running the stock catback!
That's really good. I'm sure your car acts like a completely different animal now.
Very nice.
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Old 06-26-2009, 02:56 PM   #6
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42 rwhp gain and you're still running the stock catback!
That's really good. I'm sure your car acts like a completely different animal now.
Very nice.
Reading the other threads, the stock catback isn't much of a restriction... or atleast on the M6's.
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Old 06-26-2009, 03:43 PM   #7
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Reading the other threads, the stock catback isn't much of a restriction... or atleast on the M6's.
Id bet on at least 10rwhp or a little more for a good 3 inch catback/axelback

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Old 06-26-2009, 03:47 PM   #8
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The axel back is the same on both M6 and A6...the difference is in the middle...their is a huge resonator on the A6 (to supress the sound of the AFM kicking in).

With TM gone from the Tranny and the headers on, it has certainly become a quicker ride. And now it sounds appropriate for what it is.
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Old 06-26-2009, 04:24 PM   #9
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Nice gains, I will be putting the ARH system on my L99 in the next week or 2, I will be real happy with the same increase in power.
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Old 06-26-2009, 05:38 PM   #10
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Nice gains, I will be putting the ARH system on my L99 in the next week or 2, I will be real happy with the same increase in power.
Call you guys today to talk about a few things...really interested in your OTR intake...when will you be tracking the car again with the OTR installed?
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Old 06-26-2009, 06:52 PM   #11
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Id bet on at least 10rwhp or a little more for a good 3 inch catback/axelback

Crowley

I doubt it's even half that. We pulled the axleback off the G8 during testing and saw 3hp. You won't need a 3" catback till over 500rwhp
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Old 06-26-2009, 06:59 PM   #12
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I doubt it's even half that. We pulled the axleback off the G8 during testing and saw 3hp. You won't need a 3" catback till over 500rwhp
...in that case what catback do you suggest....
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Old 06-26-2009, 07:08 PM   #13
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Honestly I don't really know what's available yet the car is still so new that I have'nt seen an aftermarket system up close yet everyone is still scrambling to get parts out. Ultimately it will more than likely be a Borla system or something custom fabbed with our mufflers if it were my personal car.
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Old 06-26-2009, 07:36 PM   #14
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I just ordered my Corsa Catback (ships Monday!), after I buy my Vararam CAI, ARH are next on my list! Does anyone sell them without the cats and if so how much?
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Old 06-26-2009, 09:29 PM   #15
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^I'm sure Tom or Nick would hook you up with a catless setup...but I guess my question would be why would you want to...the high flow cats they use are a minimal hp robber and you can always run cutouts to gain that totally roudy sound everyone wants. With no cats, you will have to deal with the "gas" smell, fail emissions, and probably have some interior drone.

I'm just saying....I've been there on both my TA and TBSS and if you can get high flow cats that don't restrict on power, I'd personally rather run those, especially on something I'm gonna drive alot. If its just a weekend car for you, then I guess that may be a little different.

I've got a wife to deal with, so I don't have a choice.
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Old 06-26-2009, 09:53 PM   #16
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Pharmd, Thanks for posting your results. 42RWHP gains is just great. Enjoy your ride this summer and thanks for choosing ARH.

Nick
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Old 06-26-2009, 11:08 PM   #17
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^I'm sure Tom or Nick would hook you up with a catless setup...but I guess my question would be why would you want to...the high flow cats they use are a minimal hp robber and you can always run cutouts to gain that totally roudy sound everyone wants. With no cats, you will have to deal with the "gas" smell, fail emissions, and probably have some interior drone.

I'm just saying....I've been there on both my TA and TBSS and if you can get high flow cats that don't restrict on power, I'd personally rather run those, especially on something I'm gonna drive alot. If its just a weekend car for you, then I guess that may be a little different.

I've got a wife to deal with, so I don't have a choice.
LOL I guess your kind of right I got a wife too and she hate's my 5.7 Charger with Zoomers.
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Old 06-27-2009, 05:10 AM   #18
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Magnaflow 3"

Mike and Nick.....I told you we got this handeled!

At least in house for now.










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Old 06-27-2009, 06:22 AM   #19
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^Andy, do you have any sound clips of that....That's basically what I was thinking about, but it has to be a wife approved sound level so I need to hear it. The fit/finish is great as uaual from you guys!
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Old 06-27-2009, 08:00 AM   #20
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agree, would like to hear what the ARH+magnaflows sounds like
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Old 06-27-2009, 08:36 AM   #21
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Good deal. Can't wait to get mine on.
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Old 06-27-2009, 08:53 AM   #22
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^Andy, do you have any sound clips of that....That's basically what I was thinking about, but it has to be a wife approved sound level so I need to hear it. The fit/finish is great as uaual from you guys!
Only our 427 video,I to will be making it wife friendly.

May also install the 3" dual in dual out up front...this is how I do the Vettes.

If you look at magnaflow production exhaust for the camaro you will see they do it this way as well.


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Old 06-27-2009, 08:54 AM   #23
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Id bet on at least 10rwhp or a little more for a good 3 inch catback/axelback

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max 5 whp

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I doubt it's even half that. We pulled the axleback off the G8 during testing and saw 3hp. You won't need a 3" catback till over 500rwhp
We have gone over 550whp with the g8 with stock axleback dropped it and picked up 7 whp ..
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Old 06-27-2009, 02:10 PM   #24
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max 5 whp


We have gone over 550whp with the g8 with stock axleback dropped it and picked up 7 whp ..
We had the exact same results with our project G8.
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Old 06-28-2009, 10:23 AM   #25
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is this system availble without cats?
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