Howdy everone. Im replacing my old MSD 8.5mm wires and I was looking on ebay and they have 10.2mm spark plug wires. Has anyone bought these wires?

 

unless you are running a MSD ignition or equivalent, you probably will see little or no gain by putting these wires on your truck. the 8.5 wires you have on it currently are more than suffecient if you are running your stock distributor and coil.

 

You also need to look at resistance. Just because its a larger wire does not mean it will carry anymore charge. Larger wire + more resistance = less power delivery