1. Are the original air injectors still available. I seem to remember they stopped producing them some time back.
http://www.randbmotorsport.co.uk/sho...p?ProductID=94

2. I also seem to remember IMA mentioning that now a single air injector replaced them.
Not replaces, supplements

3. Can you run them on a L6 ECU.
Only if converted, so best to use a L8. Obviously has to run a Pectel board and have the air injector control and boost pot enabled (if you require adjustable boost).

4. Where do they connect into (Electrics) and do they come with a wiring harness.
Goes to pin 16 (I "think" whichever is the normal amal control anyway) on ECU. Yes, but only one that is designed to plug into a Pectel loom, so needs extending to reach ECU if a new Pectel loom is not used