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Corvette Spark plugs

Your Corvette

Pick your year to see what fits.

This page covers the US C5 and C6 Corvette.

Restores lost power
Hard$60–$1202–3 hrs
All Corvette mods

Why do it

Worn plugs cost power and throttle response.

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

  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.
  • Work on a cold engine. Do one plug at a time.

Steps

  1. Remove the engine covers

    • Take off the covers.
    Watch this step (on a 1997-2004 C5) (1:27–1:47)

  2. Swap the first side

    • Swap each plug and refit the wire.
    Watch this step (1:47–4:22)

  3. Refit the cover

    • Put the side cover on.
    Watch this step (4:22–4:38)

  4. Swap the left side

    • Swap the plugs on this side.
    Watch this step (4:38–9:08)

  5. Do the driver side

    • Remove the coil and swap each plug.
    Watch this step (on a C6) (2:47–8:07)

  6. Finish the driver side

    • Fit the rest.
    Watch this step (8:07–12:27)

  7. Do the passenger side

    • Take off the parts and swap each plug.
    Watch this step (12:27–17:26)

  8. Put it back

    • Reassemble.
    Watch this step (17:26–20:02)

  9. Do the passenger side

    • Swap the plugs on this side.
    Watch this step (on a 2009 LS3) (1:20–7:16)

  10. Refit the cover

    • Fit the cover.
    Watch this step (7:16–8:14)

  11. Do the driver side

    • Swap the plugs on this side.
    Watch this step (8:14–11:09)

  12. Put it back

    • Reassemble.
    Watch this step (11:09–11:36)

  13. Do the driver side

    • Remove the coil and swap each plug.
    Watch this step (on a C6) (2:47–8:07)

  14. Finish the driver side

    • Fit the rest.
    Watch this step (8:07–12:27)

  15. Do the passenger side

    • Take off the parts and swap each plug.
    Watch this step (12:27–17:26)

  16. Put it back

    • Reassemble.
    Watch this step (17:26–20:02)

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.