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E3.99R-8 is a 14mm, 0.708” reach plug with a 5/8” hex and a tapered seat. It is built to have a cold heat range, non-resistor, and is used a variety of racing applications. E3 "R-series" racing plugs are fitted with a nickel alloy ground electrode. This allows for excellent heat transfer and an adjustable gap for high compression engines. CROSS-REFERENCE Autolite AR94 NGK 7317, R5724-8 Champion S61YC
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🇺🇸 Ship from USA · On Agora since 2025
$4.99