Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) BR10055 1969-1972 Chevrolet Kingswood

1969-1972 Chevrolet Kingswood

1983-1987 Isuzu Pickup

Center-Pull

SFI flexplates meet SFI 29

Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) BR10055 1969-1972 Chevrolet KingswoodStackable shims index spark plugs at 30 intervals up to 360, properly positioning ground strap in cylinder head for increased power and clearance between spark plug and piston. Shims are intended for use with 14mm flat seat spark plugs only. Package of 24 shims contains 12 silver 60, 12 black 90, detailed instructions, and dial chart. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find,