Ngk V-Power Racing Plug 3249

The NGK V-Power Racing Plug 3249 (R5673-8) is a non-resistor spark plug engineered for high-performance racing and competition engines where maximum spark energy and minimal electrical interference are critical. Unlike street plugs, racing spark plugs like the V-Power 3249 eliminate the resistor element that suppresses ignition noise, allowing full electrical discharge across the electrode gap for aggressive ignition characteristics demanded by tuned and modified powerplants.

The 3249 features a 14mm thread diameter with an 11mm reach and tapered seat design, establishing precise fitment in race-specific cylinder head configurations. These dimensions ensure correct electrode positioning relative to combustion chamber geometry—a critical factor in high-RPM environments where spark timing and flame kernel development directly impact combustion efficiency. The non-resistor construction delivers superior spark intensity compared to resistor-type plugs, making the NGK V-Power Racing Plug 3249 the preferred choice for naturally aspirated and forced-induction racing applications where traditional street plugs cannot provide adequate ignition performance.

This spark plug is engineered for competition engines, vintage race cars, high-performance carbureted builds, and any application where stock ignition limitations require upgrading to racing-grade ignition components. Motorsports enthusiasts running custom ignition systems or racing on isolated tracks benefit from the raw ignition capability that resistor elimination provides. NGK's V-Power line represents decades of racing spark plug development, combining reliability with the electrical characteristics necessary for winning performance in controlled race environments.

Non-resistor spark plugs require proper shielded ignition components to prevent radio frequency interference—a standard requirement in racing setups where EMI suppression is built into the ignition harness and distributor system. The NGK V-Power Racing Plug 3249 sold here is a single plug; racing applications typically require complete set replacements, so verify your engine's cylinder count and order accordingly.