Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 5 amps at 13

5 amps at 13

TPP rating of 10

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

Caps are stress-relieved for dimensional stability and fitted with high conductivity

10 ft Long

Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 5 amps at 13Stackable 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,