{"product_id":"denso-spark-plug-set-ae92-gtz-4agze","title":"AE92 GT-Z DENSO Spark Plug Set | 4A-GZE (1987-91 Corolla)","description":"\u003ch2\u003eDENSO Double Platinum \/ Iridium TT Spark Plug Set\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eFor 1987–1991 Toyota Corolla AE92 coupe equipped with the supercharged 4A-GZE engine.\u003c\/strong\u003e\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eRefresh the spark plugs on your \u003cstrong\u003e1987–1991 Japanese-market Toyota Corolla Levin or Sprinter Trueno GT-Z AE92 coupe with the supercharged 4A-GZE engine\u003c\/strong\u003e. Each set supplies four matching DENSO spark plugs. Choose Double Platinum or Iridium TT for the same factory-engine application.\u003c\/p\u003e\u003cp\u003eDENSO supplied original-equipment spark plugs for this Japanese 4A-GZE application. \u003cstrong\u003eBoth plug types are factory pre-gapped — no gap adjustment required\u003c\/strong\u003e for the original supercharged 4A-GZE configuration. Double Platinum retains original-style platinum construction; Iridium TT uses a fine iridium center electrode and platinum ground tip.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour matching spark plugs\u003c\/strong\u003e for one complete engine service set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble Platinum:\u003c\/strong\u003e platinum on both electrodes for original-style replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIridium TT:\u003c\/strong\u003e fine iridium center electrode and platinum ground tip\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFactory pre-gapped:\u003c\/strong\u003e Double Platinum 0.8 mm; Iridium TT 1.0 mm\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGasket seat and solid terminal\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e14 mm thread \/ 19 mm reach \/ 16 mm hex\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eToyota Corolla — AE92 Coupe\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003e1987–1991:\u003c\/strong\u003e Levin \/ Trueno GT-Z (Japanese-Market) \/ 4A-GZE supercharged\u003c\/li\u003e\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eFitment Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eFor the supercharged 4A-GZE, not naturally aspirated SR5 or GT-S engines.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eOriginal 4A-GZE plug gap: \u003cstrong\u003e0.8 mm\u003c\/strong\u003e. Double Platinum arrives preset to \u003cstrong\u003e0.8 mm\u003c\/strong\u003e; Iridium TT arrives preset to \u003cstrong\u003e1.0 mm\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eBoth plug types cover the same listed factory GT-Z application; no year-range choice is needed.\u003c\/li\u003e\n\u003cli\u003eEngine swaps, changed cylinder heads, turbo conversions and altered boost or ignition configurations are outside this factory-engine fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e DENSO\u003cbr\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Ignition\u003cbr\u003e\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Spark Plug\u003cbr\u003e\u003cstrong\u003eThread Diameter:\u003c\/strong\u003e 14 mm\u003cbr\u003e\u003cstrong\u003eThread Reach:\u003c\/strong\u003e 19 mm\u003cbr\u003e\u003cstrong\u003eHex Size:\u003c\/strong\u003e 16 mm\u003cbr\u003e\u003cstrong\u003eSeat Type:\u003c\/strong\u003e Gasket\u003cbr\u003e\u003cstrong\u003eTerminal Type:\u003c\/strong\u003e Solid\u003cbr\u003e\u003cstrong\u003eFactory Pre-Gapped:\u003c\/strong\u003e Double Platinum 0.8 mm; Iridium TT 1.0 mm\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eWhich Spark Plug Should You Buy?\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDouble Platinum — Best for Original-Style Restoration\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eChoose Double Platinum if retaining the original plug design is your priority, because it uses platinum on both electrodes. It covers the same factory engine and years as Iridium TT.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIridium TT — Best for Everyday Ignition Maintenance\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eChoose Iridium TT for routine spark-plug replacement. Its fine iridium center electrode and platinum ground tip provide an alternative to the original-style platinum design, not a promised power upgrade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOur Recommendation:\u003c\/strong\u003e Choose Double Platinum for original-style restoration, or Iridium TT for its fine-wire electrode design. Neither is presented as a power upgrade.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\u003cp\u003eEvery set contains \u003cstrong\u003efour matching DENSO spark plugs\u003c\/strong\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1. Spark Plug Type\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDouble Platinum\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIridium TT\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DENSO","offers":[{"title":"Double Platinum","offer_id":67995601797429,"sku":"1745","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Iridium TT","offer_id":67994971898165,"sku":"1746","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0726\/6005\/8421\/files\/ae86-denso-spark-plug-set-01.png?v=1792551065","url":"https:\/\/preserverad.com\/products\/denso-spark-plug-set-ae92-gtz-4agze","provider":"Preserve Rad","version":"1.0","type":"link"}