Dyno proven headers
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Joined: May 2013
Posts: 664
From: Texas
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i would recommend talking to a local tuner near you. Being in Cali i am sure there are plenty of quality places to choose from.
It seems you are sort of piece mealing parts together, which is OK, but in the end, the best performance will be a system that is comprised of parts that complement each other and works together. You can achieve that with many different company's parts, however at the end of the day companies often develop parts in sequence for use together and that will yield the best overall results.
All companies producing headers will have a dyno showing results, in general they will all be comparable, but depending on the mods you already have done or plan to do, you may or may not see the same results on your car.
I'd recommend talking to one of the experts - get their opinion. Then talk to another and get their opinion...then research that and look for similar set-ups to see if it will provide you the results you are looking for. Choose whoever gives you the most confidence and then pull the trigger.
Just my $.02
It seems you are sort of piece mealing parts together, which is OK, but in the end, the best performance will be a system that is comprised of parts that complement each other and works together. You can achieve that with many different company's parts, however at the end of the day companies often develop parts in sequence for use together and that will yield the best overall results.
All companies producing headers will have a dyno showing results, in general they will all be comparable, but depending on the mods you already have done or plan to do, you may or may not see the same results on your car.
I'd recommend talking to one of the experts - get their opinion. Then talk to another and get their opinion...then research that and look for similar set-ups to see if it will provide you the results you are looking for. Choose whoever gives you the most confidence and then pull the trigger.
Just my $.02
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Joined: Apr 2006
Posts: 1,677
From: London (UK)
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The stock headers are perfectly fine until you change the turbos and even then it's quite debatable as to whether you need them unless you go for AM turbos.
Is this something you intend to do?
Is this something you intend to do?
Last edited by GTRNICK; Feb 5, 2014 at 07:46 AM.
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Joined: Jan 2011
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From: Portugal
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Some companies do it to save the client some money... But at that point... What's another 2 or 3K in a 20K+ build?
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Joined: Apr 2006
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From: London (UK)
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Yes I will change turbos eventually for now my goal I just to mod it as far as I can and get the most HP with stock turbos
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i would recommend talking to a local tuner near you. Being in Cali i am sure there are plenty of quality places to choose from. It seems you are sort of piece mealing parts together, which is OK, but in the end, the best performance will be a system that is comprised of parts that complement each other and works together. You can achieve that with many different company's parts, however at the end of the day companies often develop parts in sequence for use together and that will yield the best overall results. All companies producing headers will have a dyno showing results, in general they will all be comparable, but depending on the mods you already have done or plan to do, you may or may not see the same results on your car. I'd recommend talking to one of the experts - get their opinion. Then talk to another and get their opinion...then research that and look for similar set-ups to see if it will provide you the results you are looking for. Choose whoever gives you the most confidence and then pull the trigger. Just my $.02
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Joined: Apr 2006
Posts: 1,677
From: London (UK)
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Well then it is best to decide whose turbos you will be fitting first in the near future and then buying a set of their headers IMO rather than doing a lot of mixing and matching!
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Joined: Aug 2010
Posts: 182
From: Orange, Cal
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Don't even consider GMG. They have a history of cracking and they won't back them up. I sued them last September, small claims, and won. If you go the header route, get a lifetime warranty which is written on the receipt.
I'm running in excess of 800hp and am consistently told the headers will not provide anything noticeable until after headwork.
I'm running in excess of 800hp and am consistently told the headers will not provide anything noticeable until after headwork.
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Joined: Feb 2014
Posts: 4
From: Phoenix, AZ
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I have a set of Agency Power headers with Fabspeed exhaust, and I can vouch for the better sound. Not obnoxious at idle, but at WOT it sounds a lot deeper and louder than a 997 turbo with just exhaust done. Should have some videos up by next weekend.
Cool, how do you like the AP headers were they a perfect fit?
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Joined: Jul 2013
Posts: 258
From: Charlotte
Rep Power: 28
Don't even consider GMG. They have a history of cracking and they won't back them up. I sued them last September, small claims, and won. If you go the header route, get a lifetime warranty which is written on the receipt.
I'm running in excess of 800hp and am consistently told the headers will not provide anything noticeable until after headwork.
I'm running in excess of 800hp and am consistently told the headers will not provide anything noticeable until after headwork.