Thought this was interesting...
This is basically for prelude owners or h22 owners but it compares a myth about the 99-01 prelude header gives you an extra 5 hp compared to the 97-98. But here are the results.
Toronto Prelude Club - HondaPrelude.TO articles - products review - Prelude 97-98 vs 99-01 OEM Header comparison
__________________
If you're not cracking oil pans your not low 