Can your electrical system handle all of the power demands of today’s aftermarket add-ons? It can if it’s Painless. These harnesses use the highest quality thermal-crossed linked (TXL) polyethylene wire rated to 275 degrees at 600 volts - twice the voltage load of standard GPT wire. That’s power on demand. 12-circuit circuit harness for most 1960's and 70's Chrysler, Ford and GM cars where a bulkhead connector is required.