NGK V-Power Plug 7397

The NGK V-Power Plug 7397 (TR5IX) is a premium iridium spark plug designed for automotive enthusiasts and mechanics who seek reliable ignition performance and extended service intervals. This spark plug is suitable for various applications, including rebuilding carbureted engines, tuning vintage performance builds, and maintaining stock daily drivers.

At the heart of the NGK V-Power Plug 7397 is an iridium center electrode that offers superior erosion resistance compared to conventional nickel-alloy plugs. This feature results in more stable spark voltage and a longer lifespan. The tapered seat design and robust ceramic insulator provide a gas-tight seal in the cylinder head, which helps prevent fouling and reduces the risk of misfires.

Mechanics and tuners often prefer NGK V-Power plugs for small-displacement four-stroke engines, as they deliver consistent performance across a wide range of engine conditions. The TR5IX designation indicates a specific heat range and thread pitch that matches particular engine specifications, making it essential for users to select the appropriate heat range to avoid issues like carbon buildup or preignition.