SKU: NGKWR4-1
UPC: 087295146521
MPN: WR4-1
The NGK Spark Plug WR4-1 is a premium resistor spark plug designed for reliable ignition performance in small-displacement and mid-size engines. This spark plug is ideal for daily drivers, classic restorations, or modified builds, providing consistent firing characteristics essential for effective engine management.
Engineered with NGK's proprietary resistor technology, the WR4-1 minimizes electromagnetic interference while ensuring optimal spark voltage and gap performance. The ceramic insulator is built to endure thermal cycling and high combustion chamber pressures, while the resistor core effectively suppresses radio frequency noise, making it suitable for modern fuel injection systems and electronic ignition modules.
This spark plug is perfect for street-driven vehicles, weekend cruisers, and lightly modified engines where stock heat range and resistor suppression are necessary. Installation is straightforward—simply gap to manufacturer specifications and torque into the cylinder head using standard plug sockets, ensuring compatibility with sensitive onboard diagnostics and emission control systems.
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