{"product_id":"ignition-coil-and-platinum-spark-plug-kit-for-rolls-royce-ghost-2011-2012-6-6l","title":"Ignition Coil and Platinum Spark Plug Kit 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 and Platinum Spark Plug Kit for 2011-2012 Rolls Royce Ghost (RR4)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Ignition Coil and Platinum Spark Plug Kit replaces worn ignition components on the 2011-2012 Rolls Royce Ghost to eliminate misfires, stabilize idle fluctuations, and restore factory boost delivery under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Rolls Royce Ghost Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe twin-turbocharged \u003cstrong\u003eN74B66\u003c\/strong\u003e 6.6-liter V12 operates under elevated thermal loads and high cylinder pressures. Over operational cycles, excessive heat soak degrades the internal primary and secondary copper windings within the pencil-style ignition coils, resulting in dielectric breakdown, casing micro-cracks, and inconsistent secondary voltage. Simultaneously, fine-wire spark plug electrodes erode under prolonged boost pressure, causing wider spark gaps that overwork the coils. This degradation leads to low-RPM hesitation, erratic idle profiles, and unburned fuel triggering cylinder misfire fault codes across the engine control modules.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis service kit addresses ignition degradation by pairing high-dielectric pencil coils with precision Bosch double-platinum spark plugs (\u003cstrong\u003eZR5TPP33\u003c\/strong\u003e). The replacement ignition coils feature reinforced thermoplastic housings and high-temperature potting resin to insulate internal windings against thermal breakdown. Each coil incorporates factory-matched 3-terminal blade connectors that lock directly into the \u003cstrong\u003eRR4\u003c\/strong\u003e wiring harness for zero resistance loss. The accompanying Bosch platinum plugs feature laser-welded platinum firing pins and ground electrodes to maintain precise gap tolerances and withstand extreme combustion temperatures without premature quenching or fouling.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e6x Pencil Coil-on-Plug Ignition Coils (3-terminal blade connector)\u003c\/li\u003e\n  \u003cli\u003e6x Bosch Double Platinum Spark Plugs (ZR5TPP33)\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 Mich\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\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 6.6L Twin-Turbo V12 \/ 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, IC770, ZR5TPP33\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 Base 6.6L V12 Twin-Turbo (RR4 \/ N74B66)\u003c\/li\u003e\n  \u003cli\u003e2012 Rolls Royce Ghost Base 6.6L V12 Twin-Turbo (RR4 \/ N74B66)\u003c\/li\u003e\n  \u003cli\u003e2012 Rolls Royce Ghost EWB (Extended Wheelbase) 6.6L V12 Twin-Turbo (RR4 \/ N74B66)\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 6-cylinder service package covers one cylinder bank; two kits are required to service all 12 cylinders of the V12 platform.\u003c\/p\u003e\n\n\u003ch4\u003eWhat are the installation torque and handling requirements?\u003c\/h4\u003e\n\u003cp\u003eInstall components on a completely cooled engine, thread the Bosch plugs by hand to prevent cross-threading, torque to factory specification (23 Nm \/ 17 lb-ft), firmly seat the coils, and clear stored DME misfire codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Rolls Royce Precision Standard\u003c\/h3\u003e\n\u003cp\u003eMaintaining factory European precision requires strict adherence to ignition tolerances, ensuring seamless combustion balance across all twelve cylinders with zero diagnostic trouble codes or hesitation under wide-open throttle.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67610965377272,"sku":"DS-EOH9461YK","price":239.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-platinum-spark-plug-kit-for-rolls-royce-ghost-2011-2012-6-6l-1.jpg?v=1791566975","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-platinum-spark-plug-kit-for-rolls-royce-ghost-2011-2012-6-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}