8 Cylinder Coil Igniter Module Idle Air Control 4mm relates to the hole

4mm relates to the hole diameter required to suit the 'o'ring on the outlet of the regulator

It aligns with the port angle to give the best performance- Some modification to the water pump will be necessary

The sensor can read air/fuel ratios from 10:1 to 16:1

You will also need the correct linkage bracket and rod to fit your throttle bodies

The bodies come with interconnecting linkage and TBR22 Fuel rail and fittings

8 Cylinder Coil Igniter Module Idle Air Control 4mm relates to the hole* For use with MegaSquirt, Ems Pro and other aftermarket ECUs that require a ignition amplifier. * High current capability 11. 5 Amps per channel with built in over temperature shut off circuitry. * Large heatsink for maximum component cooling. * Quick easy wiring with clearly marked heavy duty screw terminals (14 gauge 20 gauge wire). Terminals are a tension sleeve technology which provides maximum contact force and remains stable over a long period