Spark Plug Washer Indexing 14 mm Flat Seat 60 and 90 Degree Shims Set of 24 Allstar Performance

Stackable shims index spark plugs at 30 Degree intervals up to 360 Degree 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 Degree, 12 black 90 Degree, detailed instructions and dial chart. Standard outside diameter,.800 Inch.

Details:

• Outside Diameter: .800 Inch
• Color: Silver/Black
• Degree Angle: 60 Degree, 90 Degree
• Sold As: Set of 24

Application Notes:

• 14mm Flat Seat Spark Plugs