E3 Race Spark Plug Coyote & Gen-3 Hemi

The E3 Race Spark Plug Coyote & Gen-3 Hemi (MPN E3.112) is engineered for high-performance Ford Coyote and Dodge Gen-3 Hemi engines that demand reliable ignition under extreme conditions. Whether you're tuning a modified F-150, Mustang, Challenger, or Charger, these spark plugs deliver the consistent spark timing and combustion efficiency required for forced induction, nitrous systems, and high-horsepower naturally aspirated builds. E3's patented electrode design addresses a critical problem in modified engine applications: inconsistent flame kernel development that leads to misfire, power loss, and timing scatter under boost or heavy load.

The E3 Race Spark Plug uses a specialized triple-ground electrode geometry that creates a larger, more reliable ignition envelope compared to conventional plugs. This design expands the spark's ability to find fuel across a wider gap tolerance, which is critical when cylinder pressures spike during supercharging or turbocharging. The ground electrode configuration also reduces quenching—the phenomenon where the cylinder walls cool the flame kernel before combustion fully propagates—a problem that becomes pronounced in heavily modified engines with aggressive cam timing and increased boost levels. The plug's heat range and gap specification are optimized for the specific bore, stroke, and compression characteristics of Coyote and Gen-3 Hemi platforms, ensuring proper thermal dissipation and spark initiation across the entire RPM band.

Builders and tuners installing supercharged 5.0L Coyotes or stroker Hemis will find these plugs particularly valuable when running octane boosters, methanol injection, or aggressive tune strategies that push combustion temperatures into the zone where conventional plugs break down. Installation is straightforward—these plugs thread directly into your existing spark plug wells with no modifications required. For maximum reliability, set gaps according to your ECU tuner's specifications; boosted applications often run slightly tighter gaps than naturally aspirated engines to maintain stable ignition. E3 Race Spark Plugs are sold individually, so purchase a complete set matching your engine's cylinder count for optimal performance and consistency across all firing events.