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Old 05-27-2013, 10:02 AM   #1
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Headers

Does anyone know how much it would be to get some shorty headers installed? I would love to do it myself but I hear its a hard job. Also what kind of performance gains would I expect with headers. I have a 2004 gt.
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Old 05-27-2013, 10:06 AM   #2
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Shorty headers Arnt to bad but ur looking at like 150 to 250 a side matters how hard the old manifold comes out and the bolts
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Old 05-27-2013, 10:07 AM   #3
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With shorty headers the performance gain will be very near zero. Spend the money on a tune/tuner to get the best bang for your bucks...
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Old 05-27-2013, 10:08 AM   #4
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It shouldn't be to hard. My car only has 43k miles on it so its not like all the parts are rusted in.

---------- Post added at 09:08 AM ---------- Previous post was at 09:07 AM ----------

I already have a tuner. Would it make me gain some better numbers with headers?
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Old 05-27-2013, 10:10 AM   #5
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U might gain a couple not much do u also have an exhaust system
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Old 05-27-2013, 10:29 AM   #6
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Quote:
Originally Posted by Mustang2004Gt View Post
It shouldn't be to hard. My car only has 43k miles on it so its not like all the parts are rusted in.

---------- Post added at 09:08 AM ---------- Previous post was at 09:07 AM ----------

I already have a tuner. Would it make me gain some better numbers with headers?
Long tube headers will make the engine breathe differently and by doing so shift the torque curve around. Most are designed to produce more power in the middle and upper-midrange and higher where you can use it most. No performance related tuning changes are required for long tube headers, however often the values in the O2 Transport Delay table have to be increased by 15% or so to let the PCM know the sensors have been relocated further downstream.

Shorty headers are just prettier versions of the stock manifolds. The tubes are too short to do anything useful with the exhaust flow, and on many units not even of equal length. More about how tuned headers work here...
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Old 05-27-2013, 11:36 AM   #7
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U might gain a couple not much do u also have an exhaust system
I have flowmasters with the stock mid pipe
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Old 05-27-2013, 11:45 AM   #8
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Shorties are pretty much a waste man, they help flow slightly but not worth the amount they are. The stock manifolds on our car isnt very restrictive. If you have a mid and catback your good, unless you really want headers then go long tubes with shorty midpipe.
As for install it isn't that difficult as it pretty much just bolts in place of stock manifold. Lt's are a more difficult install but way more worth the $ than shorties. I say leave it alone with your setup and spend the $ on gears and a tuner or something else beneficial.

---------- Post added at 12:45 PM ---------- Previous post was at 12:43 PM ----------

My bad i thought you said you had an aftermarket midpipe. Change that to off road or high flow catted x and you'll be good and get out about $400 richer.
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Old 05-27-2013, 01:18 PM   #9
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What they said, spend that money on a better midpipe and leave the stock manifolds alone, they aren't restrictive at all.
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Old 05-27-2013, 01:45 PM   #10
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^he convinced me not to mess with headers. That $ is going towards gears/tuner
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Old 05-27-2013, 03:35 PM   #11
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Haha I should not talk, I HAVE shorty headers but only because the previous owner put them on when he did the 99 PI motor swap. I would not have messed with them nor will I when it comes time to upgrade my motor with the teksid I'm building in the garage. Shorties will come off, get blasted/ceramic coated inside and out by a local coater and go right back on. I have no allusions that I am gaining anything with the shorties over what the stock manifolds would have done.
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Old 05-27-2013, 03:37 PM   #12
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I already have gears and a tuner though. I just want a more aggressive sound

---------- Post added at 02:37 PM ---------- Previous post was at 02:37 PM ----------

I already have gears and a tuner though. I just want a more aggressive sound with some performance gains
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Old 05-27-2013, 03:38 PM   #13
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Shut ur o2s off and take the cats off

Or get high flow cats
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Old 05-27-2013, 03:40 PM   #14
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Do you have pullies? Do you have a short shifter? Do you have suspension out back to help you hook up better? Are you lowered? How is your car cosmetically? Etc... headers on a stock longblock PI engine is one of, if not THE last thing I would do. Heck for the price of a good set of shorties plus what a shop will push in your butthole for during the install you are halfway to a supercharger or all the way to a good fuel system to support said supercharger in the future.
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Old 05-27-2013, 03:40 PM   #15
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Quote:
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I already have gears and a tuner though. I just want a more aggressive sound

---------- Post added at 02:37 PM ---------- Previous post was at 02:37 PM ----------

I already have gears and a tuner though. I just want a more aggressive sound with some performance gains
A o/r mid pipe will change the sound dramatically
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