{"product_id":"ignition-coil-and-iridium-spark-plugs-for-audi-s8-2016-2018-4-0l","title":"Ignition Coil and Iridium Spark Plugs for Audi S8 (2016-2018) 4.0L","description":"\u003ch2\u003eDirect-Replacement Ignition Coil and Iridium Spark Plug Kit for 2016-2018 Audi S8\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit restores factory combustion efficiency on the 2016-2018 Audi S8 by eliminating high-boost spark blowout, secondary winding breakdown, and cylinder misfires.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Audi S8 Thermal Saturation Weakness\u003c\/h3\u003e\n\u003cp\u003eThe \"hot-vee\" twin-turbo layout of the \u003cstrong\u003eEA824\u003c\/strong\u003e 4.0L TFSI engine creates extreme under-hood thermal saturation directly adjacent to the cylinder heads. Over repetitive heat cycles, factory coil boots harden, internal dielectric epoxy degrades, and high cylinder pressures accelerate electrode erosion on standard plugs. This leads to intermittent misfires under heavy load, hesitation, erratic idle stability, and unburnt fuel entering the catalytic converters.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition service kit supplies eight high-insulation pencil coils paired with fine-wire iridium-tipped spark plugs built to withstand sustained thermal stress. The iridium center electrode provides superior arc stability and wear resistance under high boost without expanding the spark gap over time. Reinforced silicone boots prevent voltage arcing to the plug tubes, directly replacing cross-references \u003cstrong\u003eUF766\u003c\/strong\u003e, \u003cstrong\u003eGN10334\u003c\/strong\u003e, and \u003cstrong\u003e307134160\u003c\/strong\u003e for restored throttle mapping and clean combustion.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2016-2018 Audi S8\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eEA824 4.0T V8\u003c\/strong\u003e \/ \u003cstrong\u003eD4\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e605 hp \/ 517 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e307134160, UF766, 9125601, GN10334, CUF341\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2016 Audi S8 Plus (4.0L V8 Turbocharged)\u003c\/li\u003e\n  \u003cli\u003e2017 Audi S8 Plus (4.0L V8 Turbocharged)\u003c\/li\u003e\n  \u003cli\u003e2018 Audi S8 Plus (4.0L V8 Turbocharged)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the D4 S8?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2016-2018 Audi S8 equipped with the \u003cstrong\u003eEA824\u003c\/strong\u003e 4.0L twin-turbo V8 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these spark plugs require gapping prior to installation?\u003c\/strong\u003e\u003cbr\u003e While pre-gapped to factory specifications, verify the electrode gap with a feeler gauge prior to threading into the aluminum cylinder head.\u003c\/p\u003e\n\n\u003ch3\u003eThe Audi Precision Standard\u003c\/h3\u003e\n\u003cp\u003eHigh-output European biturbo platforms require precise primary-to-secondary coil resistance to prevent false-positive diagnostic trouble codes (DTCs) and unmetered ignition hesitation; this kit ensures seamless communication with the factory Bosch MED17 ECU without triggering a CEL.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50594171846904,"sku":"DS-EKT1D70BQ","price":106.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-audi-s8-2016-2018-4-0l-1.jpg?v=1790057703","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-and-iridium-spark-plugs-for-audi-s8-2016-2018-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}