NGK Spark Plug # 7240

The NGK Spark Plug # 7240 (YR55) is a premium resistor spark plug designed for reliable engine ignition across a wide range of automotive applications. This spark plug is ideal for both daily drivers and performance enthusiasts who demand dependable spark delivery. Built by NGK, a leader in ignition technology for over 80 years, it ensures consistent performance whether you're using a stock engine or a modified setup.

At the core of this spark plug is NGK's advanced resistor technology, which effectively suppresses electromagnetic interference to protect vehicle electronics. The ceramic insulator is engineered to withstand thermal cycling and high combustion pressures, maintaining a tight spark gap for efficient fuel ignition. The compact design, with an overall length of 3.4 inches, allows for straightforward installation in tight engine bays.

This spark plug is particularly beneficial for mechanics and enthusiasts working on engines where stock ignition reliability is crucial, or where aftermarket ECU tuning requires cleaner signal paths. Its proven electrode geometry promotes rapid flame kernel development and consistent firing across the RPM range, making it suitable for both stock and modified engines.