Corvette Central recommends NGK spark plugs for street and performance applications. These plugs typically result in quicker throttle response and an overall smoother running engine.
Ignitability of V-Power Spark Plugs
"NGK's unique V-Power design directs the spark to the edge of the electrode where it can develop more rapidly. This allows easier and more complete combustion of the air/fuel mixture. The increased ignitability allows the engine to burn air/fuel ratios that would otherwise be too lean."
Iridium IX - The ultimate evolution of a performance spark plug.
It may be time to invest in precious metal futures. NGK Iridium Spark Plugs represent the ultimate evolution of spark plug technology and performance. Iridium allows for a center electrode 75 percent the size of a platinum electrode and 24 percent the size of a conventional nickel electrode.
One heat range colder than stock, gapped at .035. (Works well in Nitrous, Supercharger or High-Compression Motors.)