Hondata?

I know this question has probably been asked before, i ran a search and didnt really find anything explaining it. What exactly is it and what does it do. also i have an 89 crxsi and i wanted to turbo it other than the basic turbo parts, what do i need. ive herd people talking about the "missing link" what the hell is that?

www.hondata.com

www.synapseengineering.com

so do i need either of these if i turbo my d16a6?

go to page 3. somedude started a thread on it.