Message: I have 3.9l with JBA Headers, 8mm JBA plug wires, Supertrapp exhuast, Airraid intake, V8 throttle body, Splitfire plugs, Crower 1.7 roller rockers, Ford motorsport 19lb injectors, and 3.55 ls rearend. Also should I get IAT adjuster or Jet II chip next? Thank in advance for your help.
Message: since the adjuster is on "hold" and the jet II module cost about $215.... just relocate your iat and get somewhat the same effect for the cost of a brass plug.