E3 Spark Plugs
11-24 Chrysler 300 / Dodge Challenger / Charger 6.4L 392
E3.74
The E3.74 Automotive Spark Plug is a high-performance replacement plug designed for vehicle. Engineered with E3’s patented DiamondFIRE technology, the plug promotes a faster, more complete combustion cycle—boosting horsepower, increasing fuel efficiency, and reducing emissions over the long term. This spark plug features a 14mm thread diameter, 1.000" reach, and taper seat to ensure a precise fit for your vehicle engine. Its triple-legged ground electrode secures the DiamondFIRE tip, enhancing heat dissipation and generating greater turbulence in the combustion chamber for maximum efficiency. The fixed-gap design eliminates the need for adjustments and delivers consistent spark performance across thousands of miles. Backed by a 5-year or 100,000-mile warranty, the E3.74 offers durability and peak engine performance for drivers who demand more from their vehicle.
- Patented DiamondFIRE Technology: Optimizes combustion for better throttle response, horsepower, and fuel economy
- Three-Leg Ground Electrode: Stabilizes the electrode for enhanced heat transfer and increased combustion turbulence
- Fixed DiamondFIRE Spark Gap: Factory-set for consistent ignition and long-term reliability—no gapping required
- Extended Service Life: Built to perform for 100,000 miles or 5 years under typical driving conditions
- Precision Fit: 14mm thread diameter, 1.000" reach, 5/8" hex, taper seat design
- Lower Emissions: Reduces unburned hydrocarbons for cleaner, more efficient engine performance
E3 Spark Plugs uses its patented DiamondFIRE design to target efficient combustion and consistent ignition performance across automotive and racing applications. For performance builds, a quality spark plug choice can support clean burn characteristics and reliability—especially when tuning for higher cylinder pressures or more demanding driving conditions.
E3 Spark Plugs: Chrysler 300 / Dodge Challenger / Charger 6.4L 392 2011 - 2023
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ETA stands for Estimated Time of Arrival. The date shown is calculated using our Available-to-Promise (ATP) system, which tracks real-time supplier commitments to determine when a product is expected to be available for delivery. Specifically, the date is calculated by adding 9 business days from the date a supplier has committed to ship the product, representing a worst-case scenario for when we can expect to receive inventory.
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E3.74 E3 11-24 Chrysler 300 / Dodge Challenger / Charger 6.4L 392 Spark Plugs. Enhance the performance of your vehicle with Spark Plugs. Featuring patented DiamondFIRE technology, these plugs deliver more power, improved fuel efficiency, and reduced emissions. Built with a fixed gap and triple-ground electrode for optimal heat transfer, they’re rated for 100,000 miles or 5 years.
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E3 Spark Plugs
11-24 Chrysler 300 / Dodge Challenger / Charger 6.4L 392
E3.74
The E3.74 Automotive Spark Plug is a high-performance replacement plug designed for vehicle. Engineered with E3’s patented DiamondFIRE technology, the plug promotes a faster, more complete combustion cycle—boosting horsepower, increasing fuel efficiency, and reducing emissions over the long term. This spark plug features a 14mm thread diameter, 1.000" reach, and taper seat to ensure a precise fit for your vehicle engine. Its triple-legged ground electrode secures the DiamondFIRE tip, enhancing heat dissipation and generating greater turbulence in the combustion chamber for maximum efficiency. The fixed-gap design eliminates the need for adjustments and delivers consistent spark performance across thousands of miles. Backed by a 5-year or 100,000-mile warranty, the E3.74 offers durability and peak engine performance for drivers who demand more from their vehicle.
- Patented DiamondFIRE Technology: Optimizes combustion for better throttle response, horsepower, and fuel economy
- Three-Leg Ground Electrode: Stabilizes the electrode for enhanced heat transfer and increased combustion turbulence
- Fixed DiamondFIRE Spark Gap: Factory-set for consistent ignition and long-term reliability—no gapping required
- Extended Service Life: Built to perform for 100,000 miles or 5 years under typical driving conditions
- Precision Fit: 14mm thread diameter, 1.000" reach, 5/8" hex, taper seat design
- Lower Emissions: Reduces unburned hydrocarbons for cleaner, more efficient engine performance
E3 Spark Plugs uses its patented DiamondFIRE design to target efficient combustion and consistent ignition performance across automotive and racing applications. For performance builds, a quality spark plug choice can support clean burn characteristics and reliability—especially when tuning for higher cylinder pressures or more demanding driving conditions.
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YEARMAKEMODELSUBMODEL2012 - 2024Chrysler3006.4L 3922011 - 2023DodgeChallenger6.4L 3922011 - 2023DodgeCharger6.4L 3922018 - 2025DodgeDurango6.4L 3922015 - 2021JeepGrand Cherokee6.4L SRT2012 - 2014JeepGrand Cherokee6.4L SRT82013 - 2025Ram25006.4L 3922013 - 2025Ram35006.4L 392
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Standard shipping
Free Standard Shipping on orders over $250. Select “Free Shipping” at checkout.
Free Easy Returns
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.