??????? what is a missing link that people talked about when they have turbo for the car?

I have a 1991 si do these things apply to me????????

I'm looking to he the greddy kit(92-95 civic)

 

A missing link is a large Check Valve that goes between your map sensor and your throttle body. It releases all positive pressure thorugh the Internal Valve, so your map sensor doesn't see any posive air pressure. With out this you will throw a CEL. Yes, you will need this with your car if it is Turbo Charged. Hondas ECU's are not ment to see Positve pressure. If you get a Engine Managment system Such as "Hondata" you will not need this because then you want the EMU to read the boost pressure. Hope this helps.