expected life for stock spark wires

[98-GT-Vert]

How many miles would you expect to get from stock spark plug
wires, in this case the 4.6, 1998? I'm wondering if mine are shot.

 

[98blackGT]

it depends i guess i have a 98gt also and mine are fine but i plan on replacing them soon with fordracing or msd

 

[98-GT-Vert]

Also, does anyone know what diameter the stock
wires are? I noticed that the Autolite
replacement is 8.5mm...

 

['03GTinFLA]

Haynes manual says replace spark plugs at 60,000 and do the wires whenever you do plugs. I guess take that for whatever it's worth. Not sure on the wire size.

 

[98-GT-Vert]

I just replaced my wires at 77K, and they
really needed it. At least I could feel the
difference.

 

[GDawg]

I'm pretty certain stock wires are 8mm. I replaced mine with FRPP 9mm after two years but the wires were crap in that the connectors broke quickly after a few months in the Las Vegas heat. So I went to MSD 8.5 superconductors (after a year of FRPP wires) that I've had for over three years now and I'm very happy with them.

I like my MSDs... but I hear "Livewires" are the best. Mine are more for good performance and great looks.

Before my FRPP wires got dirty:

After my MSD wires got dirty: