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Challenger · Power

Challenger Spark plugs

Your Challenger

Pick your year to see what fits.

This page covers the 2008–2023 Challenger.

Restores lost power
Hard$50–$2002–4 hrs
All Challenger mods

Why do it

Worn plugs cost power and throttle response. Fresh plugs bring the punch back. The HEMI has 16 of them.

Tools you'll need

Starting out? See our budget tool list.

Parts to buy

Double-check fitment before buying. We may earn a commission when you buy through these links, at no extra cost to you.

Before you start

  • The plugs sit under the upper intake, so plan on taking that off. Use new intake gaskets if the old ones look damaged.
  • There are 16 plugs: 2 per cylinder. Do one at a time so nothing gets mixed up.
  • There are 16 plugs: 2 per cylinder. Do one at a time so nothing gets mixed up.

Steps

  1. Remove the air intake

    • Take off the air intake tube.
    Watch this step (on a 2011-2017 3.6L) (1:08–2:13)

  2. Remove the upper intake bracket

    • Undo the bracket holding the upper intake.
    Watch this step (2:13–3:40)

  3. Unplug wires and vacuum lines

    • Disconnect the electrical plugs and vacuum lines.
    Watch this step (3:40–5:53)

  4. Unplug the PCV and booster hoses

    • Pull off the PCV and brake booster hoses.
    Watch this step (5:53–7:24)

  5. Remove the upper intake

    • Unbolt the upper intake and lift it off.
    Watch this step (7:24–9:30)

  6. Remove the coils

    • Unplug and unbolt each coil, then pull it out.
    Watch this step (9:30–10:47)

  7. Swap the plugs

    • Change each plug. Start each new one by hand.
    Watch this step (10:47–12:23)

  8. Refit the coils

    • Put the coils back and plug them in.
    Watch this step (12:23–14:04)

  9. Refit the intake

    • Bolt the upper intake back on and reconnect everything.
    Watch this step (14:04–16:01)

  10. Open up the passenger side

    • Remove the parts in the way to reach the coils.
    Watch this step (on a 2014 Challenger 5.7L) (1:36–3:22)

  11. Swap the passenger side plugs

    • Pull each coil and swap the plugs under it.
    Watch this step (3:22–5:29)

  12. Open up the driver's side

    • Remove the parts in the way on the driver's side.
    Watch this step (5:29–8:07)

  13. Swap the driver's side plugs

    • Do the same on this side.
    Watch this step (8:07–14:45)

  14. Put it all back

    • Refit everything you removed.
    Watch this step (14:45–17:25)

  15. Get ready

    • Lay out your tools and take off the engine covers.
    Watch this step (on a 392 HEMI Charger, same HEMI job) (0:00–1:17)

  16. Remove the old plugs

    • Unplug and pull the coils, then take out the old plugs.
    Watch this step (1:17–3:20)

  17. Clean up

    • Clean around the plug holes so no dirt falls in.
    Watch this step (3:20–5:07)

  18. Fit the new plugs

    • Start each plug by hand, tighten it and refit the coils.
    Watch this step (5:07–8:52)

How to know it worked

Did this guide work for you?

Safety first

  • Park on flat ground, set the parking brake and chock the wheels.
  • Never get under a car held up only by a jack. Use jack stands.
  • Let the engine and exhaust cool first.
  • Disconnect the battery before unplugging electrical parts.
  • Wear safety glasses.
  • If something doesn't match your car, stop and ask a shop.

Follow your part's instructions and your service manual's torque specs.