If your classic Mustang is running a bit rough, it could be one of a few problems. The most likely culprit, and often the easiest to fix, is the Mustang Spark Plugs, which are vital parts of the ignition system. CJ Pony Parts has spark plugs for every 1964-1973 Mustang, so you can find the parts you need for your tune-up and get your Mustang running like new in no time.
Mustang spark plugs play a key role in the ignition system of your classic Mustang, as they're the device that actually provide the ignition, after the energy for the spark is generated by the rest of the components. However, since Mustang spark plugs are providing that ignition constantly, they can gradually erode and wear out, which causes roughness in the engine and can cause performance issues and inefficiency. Thankfully, the Mustang spark plugs are easy to replace. CJ Pony Parts carries many Mustang spark plugs for 1964-1973 Mustang, so you can find the perfect ones for your car and get a nice smooth running engine again.