how to identify a4 header

[rexjr919]

So i went to the jy yesterday and i found a header in the back seat of a cb(somebody took the block ) how do i ID this Header?

[F20A CB7]

It won't b cast iron, and the bends are a lil different I think don't quote me than the a6 4 2 1 header.

[rexjr919]

This one doesn't have any Rust so it isn't an A1 header right...the A4 is better than the A6 right

[deevergote]

That's arguable. The A1 and A6 manifolds are both cast iron, but the A6 is a different design, and may flow very well. The only certainty is that the A4 manifold is better than the A1 manifold.

You can tell the A4 manifold because it's tubular. Smooth metal pipes, rather than rough cast iron. It will also be on an F22A4.

[F20A CB7]

A1 header is 4-1 cast.

A4 not cast, A6 4-2-1 cast

I found this thread to help you understand a lil more about the A4 header. But I can't find a picture.
http://www.cb7tuner.com/vbb/showthread.php?t=188255

[deevergote]

A4 is also 4-2-1, I believe.


Honestly, at this point, a cheap "ebay" header is probably a better option than a 22 year old stock manifold.


F22A4 manifold:


F22A6 manifold:


F22A1 manifold:

[rexjr919]

Ok so it has to be an A4 because it would be all rusted right

[F20A CB7]

A1 header is 4-1 cast.

A4 , A6 4-2-1< meant its the same as A4.

A4 is also 4-2-1, I believe.

Bossman did you have your coffee already

[deevergote]

Gimme a break... I've had an H22A in my car since 2003!

[rexjr919]

It looks like its in pretty good condition though I'll go check it out again today and get some pics so you guys can give me your opinions

[deevergote]

The flex pipe is the part that frequently rusts out. The top half will last forever.

[F20A CB7]

Son of a witches tits. I was looking and looking for pics and you found them

To the new guy here. Here's a great thread to read and LEARN SOMETHING. The differences between 4-1 and 4-2-1.

http://www.cb7tuner.com/vbb/showthread.php?t=91512

[rexjr919]

I understand the 4-2-1 design

[rexjr919]

Thanks for the pics