Ok, i have a 92 Prelude SI. I swapped out the SI for a 98 H22. Now i used the SI TB on the 98 intake with the 98 TB gasket, cause if the postion of the MAP sensor. Now would that change anything on the intake cause its an SI TB and not a Vtec TB? any advise would be great.

 

The H22 TB is the same size and bore as a H23 TB.
I have both sitting in front of me.

 

ok, But whats sets them apart. Why would hondaautoparts have them with different part numbers along with the gaskets.