To test the condition of your spark plug wires, we created this simple DIY diagnostics inspection to keep your car purring along.

The MSD Heli-Core 8mm wires have also been covered with MSD's Heat Guard sleeving kit (part No. 3408), which is a special woven quartz-glass fiber sleeve that protects the plug wire from excessive ...

On the surface, spark plug wires are a pretty basic part – they carry spark energy from the distributor (or coil) to the spark plugs. But when you actually go to purchase a set, you find out ...