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The DENSO Iridium Long Life FK16HR-A8 spark plug kit (4 pcs) delivers superior performance and durability for Toyota and Lexus engines. Featuring a fine-wire iridium center electrode and platinum-tipped ground electrode welded in a 360° laser finish, it ensures reliable ignition, enhanced fuel efficiency, and smoother starts. Boasting a service life of up to 100,000 miles—far exceeding conventional plugs—it offers consistent power delivery under extreme thermal and pressure conditions.
Iridium center electrode & platinum ground electrode with 360° laser-welded tip for exceptional durability and ignition.
Designed for long-lasting service life—retains spark performance up to 100,000 miles, lasting ~3× longer than standard plugs.
Enhances ignitability with a smaller electrode for improved fuel economy, greater power, fewer misfires, and smoother cold starts.
OE-quality performance—manufactured to Toyota specifications; part replaces OEM 90919-01259.
Robust construction with iridium (90% alloy content) that resists corrosion and handles temperatures exceeding 4000 °F NAPA.
Technical specs: Thread size 14 mm; reach approx. 26 mm; pre-set gap (~0.040 in / ~0.032 in) for easy installation TXN Supply.
Country of Origin: Japan
spark plug, FK16HR-A8
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