Topic: Help Identifying CB550 Header

[FunJimmy]

I just won this header on Ebay and was hoping you could confirm the description.

Auction read:

This auction features a genuine Kerker header head pipe.
Fits Honda four cylinder between the 350 ~ 550. We're not exactly sure which.
Please use the details and photos below to determine application to your particular model.

Diameter of mounting flange at head 1 5/8 inch
Diameter of header tubes 1 3/8 inches
Diameter of tube at header exit 1 3/4 inches

Please see photos below to view mounting collar style and pipe bend for oil filter access.

Is this indeed a Kerker for a CB550?

Thanks
Jimmy

[bryanj]

Fraid there is only one way to be sure and that is try and fit it!

[FunJimmy]

Fitment would be great but I haven’t got it yet.
Sure looks like a 550 pipe.
Measurements say it is, but is it a KERKER?
Can’t find any real good pics of a Kerker 4 into 1 anywhere!

Someone here knows what it is!

Later
Jimmy

[puppytrax]

1 3/8" header tubes is kinda big...my 550's only use 1 1/4" tubes (4 into 4)...

I would think you'd lose some low end torque...

[Kevin400F]

550 exhaust ports are angled relative to one another.  Looking down from the top, the header spigots should look something like this (exaggerated, of course): \  /  \  /

If they're all basically parallel as it appears in the pic, there's no way its for a 550.

Kevin

[FunJimmy]

Kevin

Thanks for piping up. I wish I had consulted you before I laid down the winning bid.

I've always wanted a quality header like Yosh or Kerker.

Guess I'll have to relist her......or maybe find a bike to fit the pipe.

What do think it fits? CB400 maybe.

Jim

[Kevin400F]

Measure the centerline-to-centerline pipe spacing between #1 and #4?  On a 350F/400F, the spacing is approximately 10 inches.  A 750 is approximately 12".   Keep us posted.

[paulages]

i don't have the time to do the unit conversion, but here are some exhaust specs that might help you:
http://www.sohc4.us/forums/index.php?topic=13519.msg161267#msg161267

[jreich]

Here are a couple pictures of the Kerker header off of my 500

[crazypj]

Never found the Kerker to be particularly good quality, but they were the loudest . (wasn't impressed by Yoshi either but don't think any of the good ones from 70's are still in business, most went bust before the 80's were done)
All the ones I saw/fitted had collector a bit further to the side it was going to exit.
You  can probably offload it to a 750 owner as it doesn't look like a 550 one to me.

PJ

[puppytrax]

You  can probably offload it to a 750 owner as it doesn't look like a 550 one to me.

yes - if you look at the middle pic, and rotate it so that the collector is horizontal, then the head pipes have a decided downward angle, consistent with the 750 tilted engine (not upright like the 550). That plus the large pipe diameter would lead me to think "750".

But that's a good thing. Those are nice looking pipes. You should be able to get a good price.   

[FunJimmy]

Thanks for all the imput guys.

Those pictures confirm that it's a Kerker.

I just measured the collector extit on my CB550F 4 into 1 and it is 2".
This pipe claims 1 3/4". Wouldn't that suggest a smaller displacement?

Keep your coments comming.

Jimmy

[FunJimmy]

Kevin

My previous reply to your post was a case of mistaken identity.

If it seemed to be an unusual reply to your contribution, that was because I had earlier
emailed a CB400 specialist friend of mine, who is also named Kevin. I thought that he had stumbled across this thread and chose to address it here as apposed to my private email.

I just realized the error in identity when my friend Kevin emailed me his response to my question.

Sorry if my reply to your post seemed a little odd or presumptuous. Nothing personal intended.

Jimmy

[Chris Liston]

Looks like a chrome MAC Header.  I think they look identical to the Kerker as most likely they copied the design.