
Hellcat and Trackhawk engines run higher cylinder pressures than naturally aspirated Hemis. Spark plugs must fire cleanly under boost and high RPM. Worn plugs cause misfires that feel like boost cut or transmission oddities.

Use OEM-spec heat range plugs gapped to factory spec. Anti-seize on threads sparingly; torque to spec to avoid damaged cylinder heads.

When plugs are due, inspect coils, air filter, and brakes. Hard acceleration and hard braking both stress heat-managed systems on SRT platforms.
Learn more in our Hellcat maintenance schedule.
Carbon ceramic pads for consistent stops after every hard pull.
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