you don't need the prop valve from a 99-00 civic si. they are the same as the ones you have now. you do need to upgrade the brake master cylinder. get a 7/8 from a 96-00 civic ex, or the ones from the 99-00 si. the brake booster is the same, unless you go w/ the 1" from the 97-01 integras, which you don't need.