Spark plug, R7282, 10 with 22 mm

NGK R7282-10 – Iridium "Shorty" Racing Spark Plug (Heat Range 10)
With 22 thread - Its mandatory to use a washer under the spark plug so it comply with the technical regulation

The NGK R7282‑10 is a compact "shorty" plug designed to save valuable engine bay space—ideal for the OKJ - OK and KZ class. It delivers outstanding durability, low ignition voltage, and clean ignition thanks to its iridium center and platinum ground electrodes, plus an integrated resistor (~5 kΩ).
Recommended Use:
Best suited for normal to warm ambient conditions where consistent, reliable spark performance is essential.
Specifications & Features:
Thread & Reach: M14 × 1.25 mm, 22 mm reach - Its mandatory to use a washer under the spark plug so it comply with the technical regulation
Electrodes: Iridium center & platinum ground for exceptional longevity and spark fidelity
Resistor: Yes (~5 kΩ) — helps suppress EMI
Heat Range: 10 — built for standard operating temperatures in racing
Durability: Designed for high RPM and thermal stress environments