##Okay.. first I've spent the last 2 hours searching honda-tech and superhonda, and have seen no real definitive answers to header questions. ##

1. Which is header is the best under $500
2. Do DC headers rust? If so, are the ceramic ones okay?
3. Will I get more power with a 2&1/2'' collector assuming I don't replace the rest of the exhaust?
4. 4-2-1 vs. 4-1. I heard you wont see any difference if your engine is stock. True?
5. How much extra hp do $900-$1000 headers produce?
6. The comptech hi-flo cat is $400. Is it worth it? Around how much power are we talking?
7. Is having a testpipe a felony?
8. Where would you get a testpipe/ or hi-flo cat installed?
9. A header and cat is a lot of money. Will I feel the difference?
10. I found two JDM header, but they look very different. Why:
http://ichibanmotors.com/cgi-bin/merchant2/merchant.mv

http://inlinefour.com/dcsporjdm41h.htm


Thanks




[Modified by jond, 8:52 PM 7/22/2001]

 

Well, I can answer a few of these...
1. Most will say either DC JDM or Stock JDM ITR header.
2. ??
3. Yes, but you will definitely need a highflow cat or testpipe to match up to the 2.5 collector.
4. 4-1 design will give higher top end, while 4-2-1 should give good mid-range, but lose some top end. Some of the new 4-2-1 designs (Toda,Spoon) are suppossed to be a good compromise.
5. It is not always just the power the effects the price, but also assemble and parts quality.
6. I would have to say no. You can get comparable high flow cats for $125
7. Not sure if it is a felony, but it does carry a rather large fine.
8. Any mechanic or performance shop can do it. Even is you have basic wrenching skills then you can do it yourself in very little time.
9. Yes, you should get a noticeable gain especially with mild tuning. If you see even the recent Hytech post you can accomplish noticeable gains with a Header and highflow cat. (HYtech's numbers include some tuning and catback exhaust)
10. The first picture is of the JDM stock Header that is in the ITR from the factory. The second photo is the JDM Header made by DC sports.

 

Thanks! What do you mean by JDM stock header that is in the ITR? Do you mean thats what they come with in Japan?

 

JDM ITR header comes from the jspec itr

 

1. JDM ITR header or perhaps the new DC although quality definately goes to the Honda piece.
2. Yes DC flanges are mild steel and will rust
3. Yes, 2.5 inch collector definately is worth some torque/power. Anything other than 2.5 inch is a waste of time on the ITR. Stock exhaust works fine.
4. 4-2-1, 4-1 doesn't matter. It's the design and engineering that matter. I've seen 4-2-1's that put out more top end power and 4-1's that put out more low end torque. MOst of the newer designs are the new hybrid design which are 4-2-1 with the mergers down by the collector and super long primaries.
5. Depends on your setup but they obviously flow much better. Stock maybe not worth much more but as you do more mods they are worth every penny.
6. $400??? No, not worth it at all. Go test pipe or get a high flow cat for $200 off one of the guys on this board.
7. Yes, technically.
8. I carry OBD-I and OBD-II test pipes for use with JDM headers.
9. Yes absolutely.
10. Already was answered.

 

Thanks!
What are some good hi-flo cats?


[Modified by jond, 10:39 PM 7/22/2001]

 

Carsound #94006

 

Yeah, carsound's good, or you can kill the earth with a test pipe.

 

Yeah, I guess technically either is illegal. With a testpipe, how does it work? Does it go inside the stock cat, or do you just plain take the cat off and put the test pipe in its place?

With carsound cats, where do I get them from?


[Modified by jond, 11:01 PM 7/22/2001]

 

A testpipe is a pipe that replaces the cat

Contact SMSP or TypeRmsm for Carsound cats

 

Cool! Thanks for everyones input.
So with a 4-1 JDM and a carsound cat, is everything bolt-on, or would I have to take it somewhere?

 

bolt on

which header are you getting DC jdm or ITR jdm


[Modified by Hybrid ctr, 11:28 PM 7/22/2001]

 

I'm thinking the ITR jdm. It shouldn't rust right?

 

The best would be get the DC JDM header than get it Jet-Hot coated in the sterling finish coating

 

check your email

 

Don't forget to modify the stock B-pipe flange by replacing it with a bigger one (60 mm).

 

I'm not sure I know what that means. Is the B-pipe flange what the cat bolts on to? If so, I guess I need a welder to do that for me?

Thanks

 

Yes, it's where the the cat bolts on the rest of the exhaust. There is a bottleneck there (1 out of 3). Here is a picture: