Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 protection and features developed for

protection and features developed for Bellâ

and have dual (10-3/4" and 11-1/2") converter bolt patterns unless specified

Made from 3/16" flat steel

1 in Thick

Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 protection and features developed forStackable 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,