Connectivity of the composing components of your vehicle is very important. And so, keeping the spark plug connected to its electrical source as well as to the cylinder is vital. But to stay connected, the spark plug is mounted with spark plug wires. The spark plug wires are one of a kind automotive wire that cannot be substituted by just any other wires. Hence, if you have the Mazda RX7 spark plug wires that are already wearing out; you have to replace them with newer spark plug wires. But do not simply get any spark plug wire available elsewhere; make sure that the spark plug wire replacement is incorporated with high standard quality. With this requisite, your surely get this from MSD spark plug wires. This product is made out of durable materials. It is even made with high class insulation to promote the optimum speed on transporting the needed current during the ignition. Thus, having this product on your vehicle will certainly give off optimum timing during the starting process. Take note that starting the ignition needs precise timing from the spark plug; but if the wires are loose or already worn out, then it will result to misfiring. To avoid misfiring and any other trouble caused by poor starting, always assure that your spark plug wires are in good shape or replace it with the Mazda RX7 MSD spark plug wires here.