As long as the wires don't touch or rub through, they should be fine forever. I still have the stock 1996 Cobra wires on my Cobra, no problems.
I just took off my 1992 wires from my 91 notch...(I switched motors) and they had the original date on them. I actually just sold them on ebay...so they are going on another guys 5.0L!!!
i had some FMS wires on my car but the boot on the #6 plug burnt in less than a year. i have taylor 8.2mm thundervolt wires now, no problems so far. the taylors look to be of better quality.
i had some FMS wires on my car but the boot on the #6 plug burnt in less than a year. i have taylor 8.2mm thundervolt wires now, no problems so far. the taylors look to be of better quality.