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HP Header installed (pics) EX DIY updated AGAIN with performance review

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Old 11-26-2003   #46 (permalink)
IronFist
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Quote:
Originally posted by Eeeeeeh
You should get a muffler with bigger piping IronFist. Your Header will work a lot better with the bigger piping and sound better with the muffler. My muffler with bigger piping helped out my CAI, and my 4-1 header helped out both!! The three really work well together.
Maybe. I've avoided getting an exhaust because they're really expensive in relation to the amount of gains you get. Plus, I don't want one with a tip bigger than 3", which is hard to find. And finally, they're noisy and attract cops.

But if I found a cheap, quiet, lightweight, small-tipped, gain producing exhaust I'd totally buy it
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Old 11-26-2003   #47 (permalink)
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get the hks hiper exhaust. it's cheap for only $275, it's small, it has that nice jdm-angled look, and it's relatively silent except at higher rpms. i have no idea about gains, it was the first engine mod i got and i didn't feel any gains, but with intake and a header you should feel something.
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Old 11-26-2003   #48 (permalink)
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Do what i did, go to www.mufflertech.com and buy the OBX rear section, i got the model II, but get whichever one you like. The tip is exactly 3 inches but looks smaller on our cars, with just the rear section its noticeable but not loud, and its deep so it doesnt sound like a bunch of bees behind you. But for about $70-150, you can go to a muffler shop and get custom 2 1/4" piping, best bet. You will feel a gain and it sounds good, its basically the same design as a cat-back just a whole lot cheaper!!

Do you have to weld a piece of metal to the header if you have an LX, or will it bolt straight up?

Last edited by civicskater : 11-26-2003 at 11:44 AM.
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Old 11-26-2003   #49 (permalink)
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Quote:
Originally posted by civicskater
Do you have to weld a piece of metal to the header if you have an LX, or will it bolt straight up?
I have no idea. There's a DIY here somewhere for putting the HP header on an LX, but that was including the piping and everything which becomes illegal since you lose your cat. But it might help you out.
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Old 11-26-2003   #50 (permalink)
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Hey Iron, if i get a HP header without the downpipe is it emissions legal? (02 manual EX)

Edit: From what i've heard on the site, the DC header sux...the HP would be nice to add cause i have a CAI and a cat-back...im hoping its legal, at least the top portion...

Last edited by TonySTiX : 11-26-2003 at 12:46 PM.
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Old 11-26-2003   #51 (permalink)
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Quote:
Originally posted by TonySTiX
Hey Iron, if i get a HP header without the downpipe is it emissions legal? (02 manual EX)
As has been stated in this thread before, if you get just the top portion it will not replace your cat (on an EX) and therefore should be legal. I don't think anyone is quite sure, however. Someone posted once about a guy who had just the top portion and passed emissions, so it should be all good.

As far as I know, as long as it doesn't replace your cat, it's all good.
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Old 11-26-2003   #52 (permalink)
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Aight..kool. im gonna search this to be totally sure... ty
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Old 11-26-2003   #53 (permalink)
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Let us know if you find out for sure.
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Old 11-26-2003   #54 (permalink)
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wheres the best/cheapest place to buy one new? it seems no one sells these used, at least the shorty with downpipe. i dont care for turbo, i want to build a all motor beast.
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Old 11-26-2003   #55 (permalink)
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it doesnt just matter if they can pass emissions, it matters if it is cvarb legal for Ca at least to pass visual inspection, i mean a turbo should passions emissions but that doesnt mean it would be legal
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Old 11-27-2003   #56 (permalink)
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Quote:
Originally posted by runner1738
it doesnt just matter if they can pass emissions, it matters if it is cvarb legal for Ca at least to pass visual inspection, i mean a turbo should passions emissions but that doesnt mean it would be legal
And you meant to say.....what?
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Old 11-27-2003   #57 (permalink)
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that the header without a carb stamp on it is not legal even if it does not replace the cat
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Old 11-27-2003   #58 (permalink)
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Depends on what state really. California...no. They have much tighter laws for emissions than most of the U.S.
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Old 11-27-2003   #59 (permalink)
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Quote:
Originally posted by Silversleeper
wheres the best/cheapest place to buy one new? it seems no one sells these used, at least the shorty with downpipe. i dont care for turbo, i want to build a all motor beast.
i have a used hp racing 4-1 header excellent condition selling for $150 shipped, picture is above
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Old 11-27-2003   #60 (permalink)
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^ Dude you have shitty feedback on eBay.
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