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I just got it installed and it really added some hp!!! I didn't expect it to do so well. Here's is some info: I have a 2001 Ex coupe. They had to take the whole left/front motor mount out to get the header in. It fit when they put the mount back on, but it made a awful vibrating noise when I drove it down the road. So, we cut the peice that was causing this and that is all. i haven't received the O2 simulator yet, but I will Monday. I highly suggest this header. Cutting that mount wasn't as big of a deal as i thought it would be. I hope this helps

 
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thanks.
I've been thinking wether or not I want to buy the header.

 
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It's all in your head. You definitely cannot feel a difference. Take it to a dyno you'll see what I mean.

Sorry to burst your bubble.

*pop*

[IMG]i/expressions/laugh2.gif[/IMG]

 
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um, no I actually have been into modding cars for a long time.. and I KNOW when I feel a difference. I KNOW i felt a nice pull after installing my HP header, pull 250 bucks outta that budget and see for yourself. Even a good friend of mine and member of this board who's been into imports longer than most of the people I know can feel the difference behind the wheel, and in the passenger seat. For the rest of you, don't let the negativity on this board discourage you. There are a lot of people on this forum who are really down about their car because it's not competing with skylines, and supras. Just have a good time with your car, and come on down to Houston in January/Febuary and see my finished project. You'll be shocked at what a 7th gen can do after reading all the BS on this board. Talk to Black99vtec, he'll completely agree... his car is moving along nicely.

 
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hey, man, where did you buy it from?

 
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Nice one pare!!! [IMG]i/expressions/face-icon-small-cool.gif[/IMG]

 
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Do you have this header?? If so, I can't imagine how you didn't feel a difference. I can fell it through the whole power band. It can't be in my head either because I've had three previous vics and I had them modded up, but this is by far the best bolt- on mod i have ever done... I just want to say that it is worth every cent of what it cost...Don't listen to the negativity as boost said because I can tell gains...especially with our cars

 
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I dont think its in his head. I bet he'll get better results once he gets that o2 simulator in too.

here's why the header simply works

it extended the initial 4 to 1 pippings longer, giving a better transition from the 4 to 1 flow, and a more even smooth flow than the stock setup.

it elminited the cat convertor and replaced it with a straight pipe. have u seen the inside of a cat convertor? its very very restrictive.

take a look at the DX, LX, HX stock exhaust setup. how the stock header is setup.

and compare it with the EX.

take a look at 5th gen (94-97) Accords. compare their DX, LX header with the Accord EX's

take a look at previous gen civics DX, LX, their exhaust system is also different.

I'd do this, but I dont want to say good bye to my mount, and I dont want to pump out more pollution.

DX, LX peeps should yield more result than EX peeps.

 
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CapYoda is right!!! Have you seen inside the stock cat?? Replacing that alone should show a good gain. I'm just saying it's the best mod I have got yet. Take my word for it or not.