stock manifold vs Stainless Works headers - Ford Mustang Forum
 
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post #1 of 4 (permalink) Old 05-18-2015 Thread Starter
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stock manifold vs Stainless Works headers

I have a 2009 4.0, with quite a few mods including a custom tune. I'm considering replacing the stock manifolds with some stainless steel headers. Currently with the stock manifold, it seems the engine gets pretty hot quick ( 10 miles of travel at 45-60 MPH ). I'm curious to know if going to the stainless headers will reduce any of that heat or make it worse? Also what can be expected as far as horse power and torque gains, from this mod?


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post #2 of 4 (permalink) Old 05-18-2015
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on most engines when you go with heads they do run cooler. but i don't know about the newer 4.0. i know alot of the engines after 2000 have header style manifolds. if your manifolds are more like headers you won't see that big of a differences in the engine temp. as for horsepower and torque gains. that all depends on what kind of headers you get. the best for torque are full length headers.


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post #3 of 4 (permalink) Old 06-26-2015
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Generally with shorty or long tubes, there will be a gain regardless.
The key factor to remember is your area's DMV regulations, which some really crack down on long tubes due to they often require the removal of your cats.

For a shorty headers, some ceramic ones should do nicely, if you intend to really push the car on hot summer days, or in general worry about them getting too hot. With most shorty headers though, you're going to notice the slight sound change (louder volume generally) more than the HP gain.

However the shorty headers are a direct replacement of your manifolds, so it's definably a nice advantage over the long tube option.


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post #4 of 4 (permalink) Old 06-26-2015
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I watched a Youtube video with a guy that put BBK long tubes on his V6...I thought they sounded like an import, rasp from the depths of hell...I don't know how much power you can squeeze out of a V6 less supercharging it, but that sound, to me, ain't worth it. Haven't heard the shorties on a V6 but I would imagine, if you kept the cats, that the sound wouldn't change too dramatically. Any kind of coating, Jet hot, titanium ceramic, etc. should run a little cooler...

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