{"product_id":"ae92-ngk-spark-plug-sets-4age-1988-1991-corolla","title":"AE92 NGK Spark Plug Sets | 4A-GE (1988-91 Corolla)","description":"\u003ch2\u003eNGK Laser Platinum \/ Iridium IX Spark Plug Sets\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor 1988–1991 U.S.-market Toyota Corolla GT-S AE92 coupe equipped with the original naturally aspirated 4A-GE engine.\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eRefresh the ignition on your 1988–1991 U.S.-market Corolla GT-S AE92 coupe with four matching NGK spark plugs. Choose the year range matching your GT-S, then select Laser Platinum or Iridium IX.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBoth styles arrive factory pre-gapped—no regapping required for the listed original-engine applications: 1.1 mm for 1988–1989 and 0.8 mm for 1990–1991.\u003c\/strong\u003e Laser Platinum retains platinum firing surfaces on both electrodes; Iridium IX offers a fine-wire iridium center electrode. The application group determines the plug profile, heat range and preset gap—not the choice of electrode material.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete four-plug set:\u003c\/strong\u003e Four matching plugs for one supported four-cylinder engine.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaser Platinum:\u003c\/strong\u003e Platinum firing surfaces on the center and ground electrodes resist electrode wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIridium IX:\u003c\/strong\u003e A fine-wire iridium center electrode with a tapered nickel-alloy ground electrode.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-matched factory preset:\u003c\/strong\u003e Both styles use 1.1 mm for 1988–1989 or 0.8 mm for 1990–1991.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistor construction:\u003c\/strong\u003e Suppresses ignition electrical interference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eToyota Corolla — AE92 Coupe — U.S.-Market GT-S\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1988–1989:\u003c\/strong\u003e Original naturally aspirated 4A-GE \/ Laser Platinum or Iridium IX.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1990–1991:\u003c\/strong\u003e Original naturally aspirated 4A-GE \/ Laser Platinum or Iridium IX.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose the year range matching your GT-S.\u003c\/strong\u003e The 1988–1989 and 1990–1991 sets use different plug profiles, heat ranges and factory gaps and are not interchangeable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot for the supercharged 4A-GZE\u003c\/strong\u003e, SR5 or other non-4A-GE engine applications.\u003c\/li\u003e\n\u003cli\u003eFitment is for U.S.-market GT-S coupes with the original naturally aspirated engine and matching ignition leads. Japanese-market applications, swapped heads, intakes or ignition components are outside this listing's stated fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Resistor Spark Plug Set\u003cbr\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Laser Platinum \/ Iridium IX\u003cbr\u003e\n\u003cstrong\u003eElectrode Design:\u003c\/strong\u003e Platinum center and ground firing surfaces (Laser Platinum); iridium center with nickel-alloy ground (Iridium IX)\u003cbr\u003e\n\u003cstrong\u003eFactory Preset Gap:\u003c\/strong\u003e 1.1 mm, 1988–1989; 0.8 mm, 1990–1991 — both styles within each group\u003cbr\u003e\n\u003cstrong\u003eNGK Heat Range:\u003c\/strong\u003e 5, 1988–1989; 6, 1990–1991\u003cbr\u003e\n\u003cstrong\u003eThread:\u003c\/strong\u003e M14 × 1.25\u003cbr\u003e\n\u003cstrong\u003eReach:\u003c\/strong\u003e 19 mm\u003cbr\u003e\n\u003cstrong\u003eHex Size:\u003c\/strong\u003e 16 mm\u003cbr\u003e\n\u003cstrong\u003eSeat Type:\u003c\/strong\u003e Flat Gasket\u003cbr\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Four matching spark plugs per set\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhich Spark Plug Should You Choose?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLaser Platinum — Best for stock restoration\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoose Laser Platinum when maintaining the original platinum plug design matters most. It retains precious-metal firing surfaces on both electrodes in the correct plug family for your selected application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIridium IX — Best for owners who prefer an iridium alternative\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoose Iridium IX if you prefer a fine-wire iridium design in the correct application-matched plug. A higher price or iridium center electrode alone does not establish a longer service life or everyday performance advantage over dual platinum in these engines.\u003c\/p\u003e\n\u003cp\u003eFor a 1988–1991 U.S.-market GT-S, the \u003ca href=\"https:\/\/preserverad.com\/products\/denso-spark-plug-set-ae92-4age\"\u003e\u003cstrong\u003eDENSO Spark Plug Sets\u003c\/strong\u003e\u003c\/a\u003e also offer Double Platinum and Iridium TT alternatives. Select the matching 1988–1989 or 1990–1991 configuration on that listing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOur Recommendation:\u003c\/strong\u003e Choose Laser Platinum for the original platinum design, or Iridium IX as a personal preference. Select the year range matching your GT-S before choosing either style.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e1. Year Range\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1988–1989\u003c\/li\u003e\n\u003cli\u003e1990–1991\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e2. Spark Plug Type\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLaser Platinum\u003c\/li\u003e\n\u003cli\u003eIridium IX\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth spark plug types are available for each application group. Every configuration includes \u003cstrong\u003efour matching NGK spark plugs\u003c\/strong\u003e of the selected type.\u003c\/p\u003e","brand":"NGK","offers":[{"title":"1988–1989 \/ Laser Platinum","offer_id":68084149977397,"sku":"1804","price":34.99,"currency_code":"USD","in_stock":true},{"title":"1988–1989 \/ Iridium IX","offer_id":68084150010165,"sku":"1805","price":41.99,"currency_code":"USD","in_stock":true},{"title":"1990–1991 \/ Laser Platinum","offer_id":68132278960437,"sku":"1806","price":39.99,"currency_code":"USD","in_stock":true},{"title":"1990–1991 \/ Iridium IX","offer_id":68132278993205,"sku":"1807","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/1logos_1_2_928695aa-fac2-4d47-9fe1-c527b5df28fb.png?v=1791582688","url":"https:\/\/preserverad.com\/products\/ae92-ngk-spark-plug-sets-4age-1988-1991-corolla","provider":"Preserve Rad","version":"1.0","type":"link"}