{"product_id":"ngk-iridium-ix-spark-plug-set-toyota-ae86-4ac-4age","title":"AE86 NGK Iridium IX Spark Plug Set – Toyota 4A-C \u0026 4A-GE (Corolla 1983-1987)","description":"\u003ch2\u003e\u003cspan\u003eNGK Iridium IX Spark Plug Set – Toyota 4A-C \u0026amp; 4A-GE\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eFor \u003cstrong\u003e\u003cspan\u003eToyota 4A-C 1.6L SOHC \u0026amp; AE86 4A-GE \/ 4A-GEU 1.6L DOHC 16V Engines\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eOverview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe NGK Iridium IX Spark Plug Set provides an engine-specific ignition upgrade for classic Toyota 4A-C and AE86-era 4A-GE engines. Each configuration includes \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003efour Iridium IX spark plugs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, providing a complete set for one 4-cylinder engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe fine-wire iridium center electrode is designed for consistent ignition, strong starting performance, stable idle, and dependable throttle response. A tapered-cut ground electrode helps improve flame propagation while reducing spark quenching.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBoth configurations use an \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eNGK heat range of 5, M14 x 1.25 threads, 19 mm reach, and a nominal 1.1 mm (.044 in.) gap\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, but the 4A-C and 4A-GE applications use different plug designs. Select the configuration that matches the engine.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003eComplete \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eset of four NGK Iridium IX spark plugs\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eSeparate configurations for Toyota \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4A-C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAE86 4A-GE \/ 4A-GEU\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFine-wire iridium center electrode\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCopper center core for efficient heat transfer\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTapered-cut nickel ground electrode\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eNGK heat range \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003e1.1 mm (.044 in.) nominal plug gap\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eResistor-type spark plug design\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGasket-style seat\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEngine-specific hex configuration for proper installation\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eVehicle Fitment\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eToyota Corolla Sport SR5\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e1984–1987 Toyota Corolla Sport SR5 AE86 – Corolla – \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4A-C 1.6L SOHC\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eToyota Corolla Sport GT-S\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e1985–1987 Toyota Corolla Sport GT-S AE86 – Corolla – \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e4A-GE \/ 4A-GEC 1.6L DOHC 16V\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe 4A-GE configuration is also intended for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAE86-era bigport \/ TVIS 4A-GE and 4A-GEU engines using the 1.1 mm spark-plug specification\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eFitment Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eSelect the spark plug configuration based on the engine installed in the vehicle.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e4A-C configuration is intended for 4A-C applications using the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e1.1 mm (.044 in.) plug gap\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e4A-GE configuration is intended for \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eAE86-era bigport \/ TVIS 16-valve engines\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e using the 1.1 mm plug specification.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eLater smallport and other later-generation 4A-GE engines may require a different spark plug specification.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCheck spark plug gap before installation and follow the Toyota service specifications for the engine.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOne set includes enough spark plugs to service one 4-cylinder engine.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e NGK\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eSeries:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Iridium IX\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eProduct Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Spark Plug Set\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eQuantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4 Spark Plugs\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCenter Electrode:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Fine-Wire Iridium\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eCenter Electrode Core:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Copper\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eGround Electrode:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Nickel, Tapered Cut\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eHeat Range:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e NGK 5\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eThread Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e M14 x 1.25\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eThread Reach:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 19 mm \/ 0.750 in.\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eNominal Gap:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1.1 mm \/ .044 in.\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eSeat Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Gasket \/ Flat\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eResistor Type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Yes\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eResistance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5 kΩ\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003e4A-C Configuration Hex Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 13\/16 in. \/ 20.8 mm\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003e4A-GE Configuration Hex Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5\/8 in. \/ 16 mm\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv\u003e\u003chr\u003e\u003c\/div\u003e\n\u003ch2\u003e\u003cspan\u003eAvailable Configurations\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eToyota 4A-C 1.6L SOHC\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e(4) NGK Iridium IX Spark Plugs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1.1 mm nominal gap\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e13\/16-inch hex\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eToyota 4A-GE \/ 4A-GEU 1.6L DOHC 16V\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e(4) NGK Iridium IX Spark Plugs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e1.1 mm nominal gap\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e5\/8-inch hex\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFor AE86-era bigport \/ TVIS applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"NGK","offers":[{"title":"4A-C 1.6L SOHC","offer_id":53436472000821,"sku":null,"price":42.99,"currency_code":"USD","in_stock":true},{"title":"4A-GE 1.6L DOHC 16V","offer_id":53436472033589,"sku":null,"price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/ChatGPT_Image_May_21_2026_02_36_48_PM.png?v=1779394562","url":"https:\/\/preserverad.com\/products\/ngk-iridium-ix-spark-plug-set-toyota-ae86-4ac-4age","provider":"Preserve Rad","version":"1.0","type":"link"}