• Spark plug, ring, and cap against white background, stamped "C87"

    18mm AC Delco Spark Plug

    $4.94
  • #C88L, AC Delco Spark Plug (Long Reach, 18mm)

    18mm AC Delco Spark Plug, Long Reach

    $6.75
  • #386, Autolite Spark Plug (18mm)

    18mm Autolite Spark Plug, 1/2″ Reach

    $3.50
  • #388, AutoliteSpark Plug (18mm)

    18mm Autolite Spark Plug, 9/16″ Reach

    $3.25
  • #3116, AutoliteSpark Plug (18mm)

    18mm Autolite Spark Plug, Projected Tip

    $4.50
  • Spark plug against white background, stamped "D16"

    18mm Champion Spark Plug

    $4.25
  • #D14, Champion Spark Plug (18mm)

    18mm Champion Spark Plug, 1/2″ Reach

    $4.25
  • #UD16, Champion Spark Plug (18mm)

    18mm Champion Spark Plug, 1/2″ Reach

    $6.30
  • #D21, Champion Spark Plug (18mm)

    18mm Champion Spark Plug, 1/2″ Reach

    $4.25
  • #D23, Champion Spark Plug (18mm)

    18mm Champion Spark Plug, 5/8″ Reach

    $10.25
  • #D89D, Champion Spark Plug (18mm)

    18mm Champion Spark Plug, Long Reach

    $19.00
  • spark plug

    18mm Champion Spark Plug, Projected Tip

    $4.25