My 03 MCS (93K miles) is suffering from some hesitation issues and since it has original plug wires, I am going to replace. OEM ones from dealer or aftermarket? Is there any reason to use one vs other?

 

Think about changing plugs first ,at your mileage then if still not performing then wires. Also check coil to see if you have problems with the posts. clean if necessary.

 

The good aftermarket plug wires we have are pretty cheap. But you need to check your coil pack for terminals 3 and 4 are probably rusty. So you might want to replace the coil pack if it is. And the high output Screamin Demon is good replacement if you need it. For spark plugs stick with the NGK plugs, they are suppose to be replaced at a 100k, so your not too far off. We also have an ignition package with it all included.

 

Running with Brisk plugs, Magnacor wires and MSD Coil pack.
Great package.