spark plug wires.

so how often do you change yours, in your race car? unless you've burned them on a header or something of course. have to change mine, got me thinking about it.

Hell! I could only get 20 yrs out of my Ford motorsports plug wires

A forced induction or NOS deal is gonna be a lot tougher on the wires, depends on the number of passes etc, I'd say every few seasons would not be a bad idea, it aint like the plug wires are the most expensive part on the engine lol.

Cap and rotor is another item that needs to be inspected and replaced every so often.

we check the resistance and compare it against the original specs. as for the cap and rotor we change it a lot and keep spares but that is with the MSD 8plus box and it is hot.