[wonderbred2nded]

What is the difference between all these types of headers? Shorty, Equal lenght, Long tube? Can someone please explain all this to me.

[FoxChassis]

There are four basic types of headers:

Short-tube, unequal-length
Short-tube, equal length
Long-tube,unequal-length
Long-tube, equal-length

"Shorty" or "short-tube" headers have shorter primary tubes than long tubes headers do.
"Long-tube" headers have longer primary tubes than shorty headers do.
"Unequal length" headers have primary tubes in different lengths.
"Equal-length" headers have primary tubes with the same length.

Examples of three of the four types:

http://www.geocities.com/mt83rd/headers.html