You should always consult your owner's manual for the exact factory recommendation. This will specify the correct heat range, thread size, reach, and gap.
However, commonly recommended replacements that often meet or exceed factory specs are:
* NGK Iridium IX: These are a popular upgrade choice among Hemi owners, known for their longevity and performance. You'll need to find the correct part number for your specific engine.
* Champion Double Platinum: Another solid option offering good performance and lifespan, though generally not quite as long-lasting as iridium plugs. Again, check for the correct part number.
* Autolite Platinum: A more budget-friendly option that still delivers decent performance. Again, verify the correct part number.
Crucially: Don't just buy any "platinum" or "iridium" plug. You must ensure the heat range, thread size, reach, and gap are correct for your 2006 Dodge Charger RT's 5.7L Hemi engine. Using the wrong plug can lead to misfires, damage to the engine, and poor performance.
Before buying, double-check the following:
* Your owner's manual: This is the most important source of information.
* A reputable parts store: Parts stores like AutoZone, Advance Auto Parts, or NAPA can look up the correct plugs based on your vehicle's VIN.
* Online resources: Websites like NGK's or Champion's websites allow you to search for plugs based on your vehicle's information.
In short: Don't rely solely on generic advice. Use the resources above to find the *precise* spark plugs recommended for your specific vehicle.
