Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 7 gpm at 90 psi

7 gpm at 90 psi

1 in Thick

TPP rating of 10

The BR8 features a unique air chamber system that evenly distributes airflow around the head regardless of the top air configuration used

Made from 3/16" flat steel

Allstar Performance Spark Plug Index Shims - 14mm - Small O.D. (All Pro) RS003C0104 7 gpm at 90 psiStackable 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,