Short Description 2309 NGK Iridium Spark Plugs for 11-25 Supercharged 6.4L 392 Chrysler / Dodge / Ram / Jeep. LFR7AIX is the perfect spark plug for your blown 6.4L 392, 1-step colder. NOTE: PLUGS SOLD IN BOXES OF 4. 16 SPARK PLUGS ARE REQUIRED (2 per cylinder). PURCHASE QUANTITY 4 (4X4=16) Description NGK IRIDIUM SPARK PLUGS 12-24 Chrysler 300 6.4L SRT8 11-23 Dodge Challenger 6.4L 392 12-23 Dodge Charger 6.4L 392 18-25 Dodge Durango 6.4L SRT 14-24 Ram 6.4L 392 2025 Ram 6.4L 392 (2500/3500)  12-24 Jeep Grand Cherokee 6.4L 392 LFR7AIX 1-Step Colder NGK Iridium Spark Plugs for Supercharged or Nitrous 6.4L 392 Chrysler / Dodge / Jeep NOTE: PLUGS SOLD IN BOXES OF 4. 16 SPARK PLUGS ARE REQUIRED (2 per cylinder). PURCHASE QUANTITY 4 (4X4=16) Shipping Information Shipping: Free Shipping! Applications & Details Part #: LTR7IX-11 Brand: NGK Availability Remarks: NORMALLY SHIPS IN 24-48 HOURS Condition: New Categories CHRYSLER 300 / 300C PARTS - Chrysler 300 Engine Performance - Chrysler 300 Ignition Upgrades DODGE CHALLENGER PARTS - Dodge Challenger Engine Performance - Dodge Challenger Ignition Parts DODGE CHARGER PARTS - Dodge Charger Engine Performance - Dodge Charger Ignition Parts DODGE DURANGO PARTS - Dodge Durango Engine Performance - Dodge Durango Ignition Upgrades DODGE RAM PARTS - Dodge Ram Engine Performance - Dodge Ram Ignition Parts 5.7L / 6.1L / 6.4L Hemi Engine Parts - 5.7L / 6.1L / 6.4L Hemi Engine Parts - Hemi Ignition Upgrades JEEP GRAND CHEROKEE PARTS - Jeep Grand Cherokee Engine Parts - Jeep Grand Cherokee Ignition