Allstar Performance Spark Plug Index Shims 14mm 1411Y 1974-1979 Plymouth Trailduster

1974-1979 Plymouth Trailduster

2A/5 specs with a TPP rating of 25

Scosche BaseClamp

1968-1974 Dodge M300

Allstar Performance Spark Plug Index Shims 14mm 1411Y 1974-1979 Plymouth TraildusterStackable 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,