12 Spark Plugs

A 6.4L HEMI engine contains 12 spark plugs total. This V8 engine uses one spark plug per cylinder, with 6 cylinders on each bank of the engine.

Spark Plug Configuration

  • 6 cylinders on the right bank
  • 6 cylinders on the left bank
  • One spark plug per cylinder
  • Standard V8 firing order

Replacement Considerations

  1. Regular maintenance every 100,000 miles
  2. Use OEM or high-quality aftermarket plugs
  3. Check gap specifications before installation
  4. Replace spark plug wires if necessary

Cost Comparison

Replacement Method Cost Range Time Required
Basic DIY $150-$250 4-6 hours
Professional Service $300-$500 2-3 hours
Complete Kit Replacement $200-$350 3-4 hours

Spark Plug Types

Standard Options:
  • Copper core plugs
  • Platinum tipped plugs
  • Iridium tipped plugs

Proper spark plug maintenance ensures optimal engine performance and fuel efficiency for your 6.4L HEMI vehicle.