offers full range of rich and lean fuel adjustment ˇ eliminates backfiring pinging popping ... thru 2006 open loop system with no o2 sensors and 36 pin ecu plug $329.99 ... thru 2006 open loop systems with no o2 sensors and 36 pin ecu plug $329.99 ... 2007 only close loop system with o2 sensors and 36 pin ecu plug $ ... to present close loop system with o2 sensors and 36 pin ecu plug $359.99 ... to present close loop system with o2 sensors and 73 pin ecu plug $359.99 ... offers full range of rich and lean fuel adjustment ˇ eliminates backfiring pinging popping ... software battery and installation tools 640200 fits twin camŽ touring models ... thru 2006 open loop system with no o2 sensors and 36 pin ecu plug $299.99 ... thru 2006 open loop systems with no o2 sensors and 36 pin ecu plug $299.99 ...