iridium plugs are good plugs, but for force fed engines, stick with stock plugs. Force fed engines will go through iridium plugs faster. The electrode on the iridium is smaller and weaker, causing easy plug damage. Plugs and wires REALLY don't make a difference unless you are running a high compression high octane engine or force fed engines. Force fed engines usually use a cooler burning plug because of the high engine temps in force fed applications. Stock ignition systems will do fine unless highly modified. Ignition also doesn't give a boost in power. Just better fuel mileage and emissions. hth