{"product_id":"ignition-coils-set-of-6-for-rolls-royce-ghost-2011-2012-6-6l","title":"Ignition Coils Set of 6 for Rolls Royce Ghost (2011-2012) 6.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil Pack Set of 6 for 2011-2012 Rolls Royce Ghost (RR4)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil pack set replaces failing coil-on-plug units on the 2011-2012 Rolls Royce Ghost to eliminate misfire codes, restore spark energy, and ensure smooth idle across the cylinder bank.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Rolls Royce Ghost Dielectric Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe twin-turbocharged 6.6L \u003cstrong\u003eN74B66\u003c\/strong\u003e V12 produces significant thermal loads within the tight engine bay of the \u003cstrong\u003eRR4\u003c\/strong\u003e chassis. Over time, constant thermal cycling degrades the factory internal epoxy potting and fine-gauge secondary windings inside the OEM pencil coils. This deterioration results in high-voltage dielectric breakdown, unmetered spark arcing, and intermittent misfires under twin-turbo boost. In addition, aged silicone boots harden and micro-crack, letting secondary voltage ground out against the cylinder head spark plug tube, triggering DME misfire codes P0300 through P0312.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to direct factory tolerances, these pencil-style coil-on-plug units use high-grade magnetic laminations and heat-resistant epoxy insulation to withstand continuous engine compartment temperatures exceeding 250°F. Premium silicone spark plug boots maintain elasticity under severe heat soak, isolating secondary voltage and sealing out contaminants from the spark plug well. Fitted with factory-matched 3-terminal blade connectors, these coils drop onto the spark plugs and plug into the OEM engine harness without splicing or adaptation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e6 Direct-Fit Pencil Coil-on-Plug Ignition Coils with Silicone Boots\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100% style=\" border-collapse: collapse border: solid font-size: min-width:\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;\"\u003e2011-2012 Rolls Royce Ghost\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;\"\u003eN74B66 \/ RR4\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;\"\u003e563 hp \/ 575 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;\"\u003e12138616153, 12137594596, UF667, 178-8508, 178-8522, 0221504464, 0221504470, 0221504800, C1404, C1477, C1638, C1795, C1826, GN10328, GN10571, IC770, U5272, 5C1476, 5C1695, E1167\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2011 Rolls Royce Ghost 6.6L Twin-Turbo V12 (RR4)\u003c\/li\u003e\n  \u003cli\u003e2012 Rolls Royce Ghost 6.6L Twin-Turbo V12 (RR4)\u003c\/li\u003e\n  \u003cli\u003e2012 Rolls Royce Ghost EWB 6.6L Twin-Turbo V12 (RR4)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the RR4 Ghost?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2011-2012 Rolls Royce Ghost equipped with the \u003cstrong\u003eN74B66\u003c\/strong\u003e engine. Note: This package includes 6 coils for one bank; a full vehicle replacement requires two sets for all 12 cylinders.\u003c\/p\u003e\n\n\u003ch4\u003eShould I replace spark plugs at the same time?\u003c\/h4\u003e\n\u003cp\u003eYes, installing fresh plugs with correct electrode gaps alongside new coils ensures optimal primary coil saturation and prevents premature coil failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Rolls Royce Precision Standard\u003c\/h3\u003e\n\u003cp\u003eCalibrated to stringent European luxury performance standards, these ignition coils restore exact factory dwell response, preventing DME fault codes and maintaining the vibration-free powertrain delivery expected of a twin-turbo V12.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67610962985208,"sku":"DS-EWUSN3FDH","price":102.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coils-set-of-6-for-rolls-royce-ghost-2011-2012-6-6l-1.jpg?v=1791566753","url":"https:\/\/performancechiptuning.com\/products\/ignition-coils-set-of-6-for-rolls-royce-ghost-2011-2012-6-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}