This is random but I was wondering why the SH header is shorter. The base and SH blocks are teh same so what would warrant the need for a shorter header. Neither produce more hp then the other as well

 

base and sh blocks are different, despite the fact that they are both H22A4

a sh engine will not bolt up to a base tranny, and vise versa.


https://honda-tech.com/zerothread?id=1081801

 

That is partially wrong. A base tranny will bolt up to an SH block, but you will need to make a bracket for the intermediate shaft. I know this for a fact, cause I did this with my very first Prelude, and I actually did this again 2 weeks ago for a friend of mine cause we converted his SH to a Base. The SH header is longer than the Base header cause of the ATTS unit.

This isn't my write-up, but it's one that I followed

http://preludepower.com/forums...+Base

 

i forgot to say 'without modification'

 

interesting didnt know that atts was attached to the back of the block lol. Learn something new