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View Full Version : Installed a H22A dc sports header, pics



thegreatdane
11-21-2006, 02:14 PM
I mutalized my brand new header and mounted it on the B20A.
To make the header itself fit, I had to cut off the flange for the downpipe, turn it 180 degrees (to clear the engine block) with a slight angle change and weld it back on. The studholes was grinded to match and I ported the 2 center runners by adding metal inside one side of the runner and grinding some away on the other side. I think the 2 center ports are offset by about 2mm between H22A and B20A so it's no big deal to portmatch.
The downpipe needed to get it's angle changed by quite alot to be able to mount it and needed to get rerouted to clear the steering rack. And I of course also turned the flange 180 degrees.
I welded a complete new stainless exhaust, with straight through silencer and magnaflow muffler, but I'm considering replacing those because that shit is loud as hell when below 4000rpm. Would get very annoying when cruising...

Some misc. pics (of course I forgot to take one of the engine bay with the header, will prob. get around to it soon):

http://img125.imageshack.us/img125/2729/neuimgp0897mr2.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0897mr2.jpg) http://img125.imageshack.us/img125/926/neuimgp0898cz5.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0898cz5.jpg) http://img125.imageshack.us/img125/1214/neuimgp0899yi1.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0899yi1.jpg) http://img125.imageshack.us/img125/4572/neuimgp0900fi7.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0900fi7.jpg) http://img125.imageshack.us/img125/5228/neuimgp0904tw3.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0904tw3.jpg) http://img125.imageshack.us/img125/8973/neuimgp0905hn8.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0905hn8.jpg) http://img125.imageshack.us/img125/4513/neuimgp0908ze7.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0908ze7.jpg) http://img125.imageshack.us/img125/3576/neuimgp0910iy5.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0910iy5.jpg) http://img125.imageshack.us/img125/8162/neuimgp0911gz0.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0911gz0.jpg) http://img125.imageshack.us/img125/3876/neuimgp0912db1.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0912db1.jpg)

thegreatdane
11-21-2006, 02:15 PM
http://img125.imageshack.us/img125/2280/neuimgp0916pf5.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0916pf5.jpg) http://img125.imageshack.us/img125/6480/neuimgp0915hb2.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0915hb2.jpg) http://img125.imageshack.us/img125/6346/neuimgp0914bh1.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0914bh1.jpg) http://img125.imageshack.us/img125/4706/neuimgp0913al0.th.jpg (http://img125.imageshack.us/my.php?image=neuimgp0913al0.jpg)

and goodnight

MessyHonda
11-21-2006, 02:21 PM
looks good....when i read the title i thought you had put a h22 in your car....:lol:

nswst8
11-21-2006, 03:11 PM
Good work, I like the welds. Just enforces that alittle fabrication can get you anything you want.

shepherd79
11-21-2006, 03:45 PM
why did you use H22, you know you can use B series header. it will bolt up, just need to change the downpipe a little.

A20A1
11-21-2006, 04:21 PM
Man I would just love to have a lift to work on my car :)

Nice work.

Tomisimo
11-21-2006, 06:05 PM
why did you use H22, you know you can use B series header. it will bolt up, just need to change the downpipe a little.

You mean i can use all B-series headers? or?

MessyHonda
11-21-2006, 07:44 PM
why did you use H22, you know you can use B series header. it will bolt up, just need to change the downpipe a little.

the prelude b20a5 headers are geting rare....they were starting a group buy over at prelude power but i think it was for the megean headers

thegreatdane
11-22-2006, 06:10 AM
Thanks guys. Took a while actually to fab up that exhaust lol.


why did you use H22, you know you can use B series header. it will bolt up, just need to change the downpipe a little.

No the B20A5 ones will fit with a little modification, but I felt like getting a DC header, and to get one of those for a B20A5 it will run you around $300-350 for a used one since they are out of production. I think I paid $240 for the H22 one and since I was going to mod the downpipe for 2.5" anyway it didnt matter much.

carotman
11-22-2006, 01:21 PM
Nice work!!!! It's nice to see someone as dedicated as me to his car :D

There are more mods to do to this header if you compare it to a B20A5 but like you said, they are out of production :(

P.S. I need to get a stainless exhaust sooooooooooooooo bad!

2oodoor
11-22-2006, 02:01 PM
eggcellant work
I had a concern while working on my exhaust, on the subject of chopping up headers. When your welding the pipes together, the back side of the weld that you cannot access , in a perfect world, should be grinded down and dressed off to prevent any (you pick) (static, sound wave, pulsed, sonar tuned**) backpressure that these four cylinders could be subject to. I am sort of refering to a How to or otherwise explanation on backpressure and how to design the best practice situation on lengths and diameters of pipe .etc..
When putting these pieces together I will guess that having one quarter size up OD sleeves at some unions to prevent that from occuring. I wound up with , about six welded unions including the resonator tip. And now I wonder just how much harm in flow that could create, some are butt welds like on your header conversion.
** can not think of the word used in the explanation

thegreatdane
11-22-2006, 02:21 PM
Nice work!!!! It's nice to see someone as dedicated as me to his car :D

There are more mods to do to this header if you compare it to a B20A5 but like you said, they are out of production :(

P.S. I need to get a stainless exhaust sooooooooooooooo bad!

Thanks and yea, makes you feel less stupid to be spending so much money on your car doesnt it haha :D

P.S. Yes you do. Stock is a pos lol

thegreatdane
11-22-2006, 02:30 PM
eggcellant work
I had a concern while working on my exhaust, on the subject of chopping up headers. When your welding the pipes together, the back side of the weld that you cannot access , in a perfect world, should be grinded down and dressed off to prevent any (you pick) (static, sound wave, pulsed, sonar tuned**) backpressure that these four cylinders could be subject to. I am sort of refering to a How to or otherwise explanation on backpressure and how to design the best practice situation on lengths and diameters of pipe .etc..
When putting these pieces together I will guess that having one quarter size up OD sleeves at some unions to prevent that from occuring. I wound up with , about six welded unions including the resonator tip. And now I wonder just how much harm in flow that could create, some are butt welds like on your header conversion.
** can not think of the word used in the explanation

I dont think you need to worry too much about the backside of the weld as long as your past the header itself. The backside of the weld is usually pretty clean as is.
If you want it closer to perfect, you'll need to get it TIG welded.
Slip over joints are nice for mufflers and such but less practical to apply everywhere and honestly I think welding it together will create less disturbance on the backside anyway unless you're a shitty welder.

2oodoor
11-22-2006, 08:31 PM
I hope your right, I did have to cut the flange on the underside (two 12mm nuts) off the original, and cut the header a littleshort because I bought it used, and had to fit it to flex pipe instead of ball joint type flex. About 14 inches from there cat it goes into a smithys muffler, a striat thru muff glasspack with disc baffle, in the output end, then its factory pipes to the back with only a apperance style with small baffle resonator tip, it does not sound or look like any other car Ive heard, its pretty quiet,I have the tip up at an angle sort of, bug style... but it will rasp a little during torque bands. It always sounds like a quiet bug style header set up, sort of. I just think it was too many unions and maybe the muff may be too close to header, Maybe its nothing to worry about though, or I should used 2.5 inch pipe, maybe someday, Right now I am convinced that the kind of power,sound and effeciency s in the civic, mini me set up. But I still keep the 3G, do a bottom end rebuild next year. Im intrigued by the fwd dirt track scene and a sure bet would be a sohc vtec. sorry for long story...

Cheeseburger
11-22-2006, 10:28 PM
wow that looks hella hot "maing"

TWOLOUDNPROUD
11-22-2006, 10:53 PM
thegreatdane Where is the top veiw pic?

A20A1
11-22-2006, 11:28 PM
So no one is buying the stainless prelude cat-backs then?

ilikevtecs
11-23-2006, 01:01 AM
Nice work looks really good!

thegreatdane
11-23-2006, 07:21 AM
Thanks.

Btw. I was a bit dissapointed of how poor finish the DC sports headers have on the inside. Didnt look any better than my old Pacesetter for the A20.

There arent any topview pics twoloudnproud... Yet.

thegreatdane
11-24-2006, 09:53 AM
here's the enginebay


http://img329.imageshack.us/img329/6093/engbayhd6.jpg

TWOLOUDNPROUD
11-24-2006, 12:51 PM
Now the a sexy topview Right there....................................
here's the enginebay
http://img329.imageshack.us/img329/6093/engbayhd6.jpg

AccordB20A
11-24-2006, 02:48 PM
thats sick. i wish i had a job so i cd do some mods to my b20a

MessyHonda
11-24-2006, 08:54 PM
nice top view... contrats....engine bay looks real clean...i wish mine was like that....mind to share some tips?

thegreatdane
11-25-2006, 01:52 PM
Thanks guys.

Tips? Hmm idk, take out your engine and get some engine degreaser and start scrubbing the bay and engine. Not much magic to it really.

MessyHonda
11-25-2006, 11:55 PM
Thanks guys.
Tips? Hmm idk, take out your engine and get some engine degreaser and start scrubbing the bay and engine. Not much magic to it really.

mine is a DD...plus i dont want to take out my engine just to clean it....il just get some heavy duty engine degreaser tomorrow...and scrub away with like a small brush.

A20A1
11-26-2006, 12:29 AM
simple green

MessyHonda
11-26-2006, 12:35 AM
simple green

thanks....tomorrow i will go get some basic stuff...like a sprayer for the hose since believe it or not my hose still has both sides....my other one has the lil thing cut off and all i can use is my thumb...lol

carotman
11-27-2006, 07:51 AM
SImple Green makes wonders!

2oodoor
10-31-2008, 05:04 AM
So the most work was getting the downpipe flange 180'd and hooking up the flex. I see no work done on the head side flange??

thegreatdane
10-31-2008, 07:37 AM
The most work was probably getting the angles right along with flipping the downpipe flanges 180 deg. (You have to change the angle of the downpipe flange on the upper header)
You do need to do some work to the head flange and I suppose that took me a while as well, since you need to do some welding on the 2 center runners if you want the ports to match up.

http://img100.imageshack.us/img100/904/imgp0572sx1.jpg

snoopyloopy
10-31-2008, 08:01 AM
hmmm so would you be willing to mutilate another h22a header and ship it to me?

thegreatdane
11-01-2008, 09:25 AM
Sorry I havent really got the time and besides I can only imagine that it will be a lot cheaper for you to get it done locally. Or try to find a B20A5 header, those do not require all this work.

AccordB20A
11-01-2008, 10:23 AM
Im using a stock honda h22 header cause its not made of cast iron and its all i can afford, I will modify the head flange and all i plan on doing with the down pipe is welding the h22a's downpipe flange onto the b20as downpipe so i dont have to change angles with any of the bends. I dunno how it will affect power but it seems the easyest way to get rid of that ugly, but effective oem cast manifold.

2oodoor
11-01-2008, 05:24 PM
yeah the cast oem does look like it was thought out, made to flow decent.
I have so much work in getting this one off, no way am I wanting to put cast iron back on it. I have the smooth shiny sexy custom carb-ey intake manifold, it needs more smooth company.

b20a86lude
01-20-2009, 06:42 PM
so any h22 header will work?

b20a86lude
08-04-2009, 02:02 PM
dude i need to knw if this will work i know its expensive but its worth it to me
http://cgi.ebay.com/ebaymotors/Honda-Civic-CRX-RMF-Drag-Race-Header-H22-PRELUDE-H22A_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14QQh ashZitem45ec423373QQitemZ300316504947QQptZMotorsQ5 fCarQ5fTruckQ5fPartsQ5fAccessories

MessyHonda
08-09-2009, 04:31 PM
i would get a 2 piece....cuz it might need some downpipe angle changes

thegreatdane
08-13-2009, 01:26 AM
1st problem I see: will it clear the radiator?

2nd problem: it's one piece which makes it more difficult to make cuts and reweld it. And you WILL need to cut and weld it.