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

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Old 05-28-2009, 10:11 PM   #76
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Thanks radz, seems these are comparable gains to what Tag got with his Stainless Works.
I'm really confused...Tag got a 24rwph gain with complete headers, mufflers and tune. The ARH system is putting down 50rwhp with a tune and stock mufflers. Am I missing something?
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Old 05-28-2009, 10:47 PM   #77
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I'm really confused...Tag got a 24rwph gain with complete headers, mufflers and tune. The ARH system is putting down 50rwhp with a tune and stock mufflers. Am I missing something?
yep...TAG's had no tune....
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Old 05-28-2009, 11:22 PM   #78
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Man, no matter who makes stuff for this car, the mods are producing a retarded amount of power. I find it amazing that the stock components suck THAT bad.
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Old 05-28-2009, 11:49 PM   #79
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Man, no matter who makes stuff for this car, the mods are producing a retarded amount of power. I find it amazing that the stock components suck THAT bad.
haha, i see it as a bonus lol
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Old 05-29-2009, 12:57 AM   #80
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Man, no matter who makes stuff for this car, the mods are producing a retarded amount of power. I find it amazing that the stock components suck THAT bad.
Been like that for YEARS with the LS series motors. They love to breathe. Full exhaust and a tune on a LS1 will get you 30-40HP on a smaller cubed motor.

I wonder how much power itll make with a FAST intake though.
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Old 05-29-2009, 03:13 AM   #81
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I highly doubt the whole nation will adopt the CA emissions laws. It would cost a fortune to oversee, change over equipment and train people to do it. Right now, the country cant afford that.

In the future, I think it will happen. Possibly in 10-15 years but not very soon.
I guess you missed the Obama press conference last week.

With that said ARH makes an awesome products. Mustang owners swear by them and hopefully Camaro owners will as well.
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Old 05-29-2009, 10:49 AM   #82
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Old 05-29-2009, 11:35 AM   #83
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haha, i see it as a bonus lol
Oh i definately don't think it's a bad thing, just never ceases to amaze me
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Old 05-29-2009, 11:45 AM   #84
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Are the cats welded to the x pipe? or are they a bolt on? I hope they are bolt on I usually run an off road set up in my cars then when time for inspection roles around I put the cats on then take it in.
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Old 05-29-2009, 12:40 PM   #85
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Are the cats welded to the x pipe? or are they a bolt on? I hope they are bolt on I usually run an off road set up in my cars then when time for inspection roles around I put the cats on then take it in.
just let the hammer slip and accidentally damage your stock ones and get some highflows that bolt up
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Old 05-29-2009, 12:43 PM   #86
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I think they are welded into the piping...a cutout installed before the cats would certainly fix this issue however...and that way you wouldn't even have to get under the car...just flip a switch.
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Old 05-29-2009, 02:44 PM   #87
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I guess you missed the Obama press conference last week.
Which one? He makes a speech every other day.

Regardless, it pisses me off that we (tax payers) are going to pay for emissions controls.
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Old 05-29-2009, 05:37 PM   #88
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Guys, The scoop on the factory mufflers is this, they sound absolutely awesome with our system. This was a concern of ours but it turned out to be huge relief. The sound could best be descibed as a cross between Flowmasters at idle and part throttle to Magnaflows when you're hammering it. What's great is that although there's quite a bit of volume, there is no drone. The catted portion of the system is not welded to the X-pipe.

Nick
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Old 05-29-2009, 05:43 PM   #89
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Guys, The scoop on the factory mufflers is this, they sound absolutely awesome with our system. This was a concern of ours but it turned out to be huge relief. The sound could best be descibed as a cross between Flowmasters at idle and part throttle to Magnaflows when you're hammering it. What's great is that although there's quite a bit of volume, there is no drone. The catted portion of the system is not welded to the X-pipe.

Nick
Nick - have you guys experimented with aftermarket and OEM mufflers, power-wise? I'd be interested in seeing if there were much in terms of gains.

Thanks and great job
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Old 05-29-2009, 07:06 PM   #90
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Two questions:
1) Can we hear them?
2) Will they be available without cats?
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Old 05-29-2009, 07:47 PM   #91
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Radz, We dyno tested the G8 mufflers, which happen to be much quieter than the Camaro's, and only saw a 3 RWHP gain by removing them altogether and dynoing with open exhaust. I expect these mufflers to be at least as good as the G8's if not better.

Wavrun, I will have a sound clip hopefully next week as we have another Camaro coming in. You most certainly can buy the off road catless system.

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Old 05-30-2009, 01:48 AM   #92
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Any chance you will make this system with a H pipe?
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Old 05-30-2009, 05:38 PM   #93
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Originally Posted by A.R. Headers View Post
Wavrun, I will have a sound clip hopefully next week as we have another Camaro coming in. You most certainly can buy the off road catless system.

Nick
Hopefully towards the end of next week because I am coming back to Long Island the middle of next week for a mini-vacation. I would love to come check these out!
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Old 05-30-2009, 07:23 PM   #94
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Sooo....no before and after dyno #'s? I'm guessing stock it made 355-365rwhp? Which would mean now it makes 405-415 rwhp with just headers and a tune? Please elaborate.
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Old 05-30-2009, 11:24 PM   #95
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Sooo....no before and after dyno #'s? I'm guessing stock it made 355-365rwhp? Which would mean now it makes 405-415 rwhp with just headers and a tune? Please elaborate.
Yes I do have a before and after dyno graph. It was scanned earlier today. I'm waiting on Tom to post it. This vehicle made 383RWHP and 379TQ SAE corrected. It finished off with 433RWHP and 424TQ.

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Old 05-31-2009, 01:55 AM   #96
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Just wondering if these are gonna be ceramic coated.are if they can be by ARH
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Old 05-31-2009, 02:07 AM   #97
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Just wondering if these are gonna be ceramic coated.are if they can be by ARH
you can have them coated but they are stainless why??
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Old 05-31-2009, 08:15 AM   #98
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Yes I do have a before and after dyno graph. It was scanned earlier today. I'm waiting on Tom to post it. This vehicle made 383RWHP and 379TQ SAE corrected. It finished off with 433RWHP and 424TQ.

Nick
OK, thats what I was waiting for! BAD A$$!!!
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Old 05-31-2009, 08:45 PM   #99
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OOOOOO! very nice....what exhaust setup you gonna run with it?

We used the stock exhaust

looks necked down at the end to 2.5"??? i would keep mine at 3" with some mufflers and tips....just me tho
This is so it will connect properly to the stock axleback

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Can't wait to see price, what mufflers did they run?
Price will be posted later this week

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street legal?
Depends on the state

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Just because they offer cats doesnt mean that they are street legal.

IE: If it doesnt have a CARB number it wont be legal in CA. Hell, it wont even pass the sniffer test WITH the cats on it there.
It's true all long tube systems are not technically street legal it really depends on your state and their testing procedures. Most states don't do sniffer on obd2 cars just computer scan no codes= pass the codes are usually taken care of by your preffered tuner.
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Old 05-31-2009, 09:01 PM   #100
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Very good looking system and great HP gains. Were these gains with the 1 7/8" headers? If so, have you dyno tested with the 1 3/4" also and what were the results? Any dyno graphs available for us to see?
These were done with 1-7/8 primaries we did not make pulls with a 1-3/4 setup this car was trailed to us from the dealer before the owner took possesion we promised not to drive it other than to test the system there was no need to wring it out with another set. Once guys start installing them you will see where the other sizes shine HP wise. Dyno graph just posted in new thread with installed pictures.

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Legal in Virginia? :[
I'm not familar with Virginia's laws sorry

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I am sure these are stupid questions but I am new at this.

1) Any sound clip or video with audio to hear what these sound like?
2) Will they work on the automatic (L99?)?
No such thing as stupid questions no sound clip there was'nt time we did'nt have a video cam,era handy and we were on a real tight time frame. And they will definately work on an auto

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Are those CAT's inbetween the O2 bungs? They seem very small if so.

Those are the cats we use they are made by an OEM supplier and are nearly bulletproof. They are 200 cell metalic matrix cats the highest flowing cats currently available with this kind of durability

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From what I understand, it is illegal to mess with the CATS, i.e., can't move them. I don't see how this would not be considered moving the CATS, therefore, fail inspection if the inspector takes the time to visually examine the underside.
other than Cali. most places tend to be pretty leniat concerning a visual inspection especially on a brand new car.

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AWESOME GAINS! To the OP's post earlier - where the pipes neck down to about 2.5'-inches is the merge collectors ARH use. QTP is the only other major company I know of that use these collectors standard. These promote scavanging of the exhaust by keeping the velocity of the gases as high as possible. Kooks has something similar on many of their LTs, but they're not quite as good, from the looks of them (they have true high velocity merge collectors for an additional cost though for some models, last I checked). Anyhoo, these are great gains! I didn't really think they'd be this high, but considering the numbers - WOW! Has ARH mentioned if they are going to offer additional sizes and stepped primaries for the 5th Gen too?
I believe the OP was talking about the connection area at the rear,to the axleback but you are correct that high velocity merge collectors are standard on this system as well as all our other systems because they work there is no cost spared to bring you the best system possible. We will be doing primaries in 1-3/4, 1-7/8 and 2" we can do steps in those sizes also I doubt many will need a 2" header for quite awhile though

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So is it OK to run long tubes w/o a tune? I know it would benefit from a tune but it was my understanding that to compensate for the better breathing a tune was necessary with LT's. Oh and great looking headers, a set just might be in my future
You can drive without a tune without hurting anything but you will be down on power and will more than likely see a CEL for cat efficeincy(sp)
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