Holley TFI Adapter Upgrade

For those who have experienced intermittent misfires, weak or erratic PIP signal and coil control while using the standard Holley 558-305 TFI adapter, there's a good chance its because those are build with low quality Dorman 85130 pigtails spliced in. These TI units have upgraded connectors, pins and larger 18 ga cable with zero splices through out . Several cases I worked on personally instantly experienced a much better idle quality and were able to rev higher with no drop outs.