Tempest Aviation Spark Plug UREM37BY (Box of 12)

This aviation-grade spark plug features a high-conductivity copper core electrode encased in a nickel alloy sleeve, delivering exceptional thermal and electrical performance while resisting corrosive combustion gases.

Its advanced glass centre seal uses a fired-in resistor to replace older, failure-prone designs, offering improved resistance stability and reducing the risk of misfires, fuel waste, and engine roughness.

Built to withstand demanding conditions, the high alumina ceramic insulator provides superior mechanical strength, excellent dielectric properties, and a proprietary protective glaze for reliable high-performance operation.

The nickel ground electrodes are engineered to minimise sparking voltage while preserving precise gap specifications, supporting strong, stable ignition for complete combustion.

A proprietary vacuum-infusion process seals the electrode-insulator gap for consistent heat range and improved centre electrode cooling.

The hot-lock assembly uses intense pressure and heat to create a secure, leak-proof bond between the insulator and shell, protecting against high-pressure combustion gases.

A smooth, oxide-treated spring contact surface ensures excellent corrosion resistance and secure harness connection, chemically bonded to the fired-in resistor for optimal energy transfer.