My friend has introduced this to me but from what I have heard it is the best for its price especially if you have an apexi AFC.

This system is called the Afc hack and works with an apexi afc, 450cc dsm injectors, and older honda resistor box. From what I have heard, it gives exellent boost transition and elimanates the horrible check engine light. which can destroy your engine.

Check It out at: http://www.honda-tech.com/zerothread?id=324792

also search on honda-tech for: afc hack

There is more info on this subject.

Tommy,