When upgrading to the Aeroflow Performance IGN-1A Smart Coils (AF4020-8289) there are two options. You canbuild an adapter harness with the plug & pins or buy this universal pre-made universal harness. This saves you a large amount of time andlabour. Aeroflow's created this harness to be easily adaptable, for both OEM and aftermarket ECU's. Installing this harness is as simple as re-pinning the factory coil signals and ignition trigger wire.  Can be run in direct fire or waste spark configurations. Itfeatures a 40 amp sealed relaywith a weather seal fuse holder built into the wiring harness to ensure a full 12 volts is supplied to these coils at all times. Each harness has either an 8 pin or12 pin DT Deutsch on the end of the harness with the supplied pins to allow the user to pin into their wiring harness. Available to suit 4 cylinder (8 cylinder with two of these) or 6-cylinder options.