Since 1952
America's Oldest Speed Shop ®
Speedway Motors Bill Smith
Loading...
Products

SHIM-DEX has revolutionized the use of spark plugs. With the use of SHIM-DEX spark plug shims you will increase power and provide crucial clearance between the spark plug and piston. Never buy extra spark plugs to have them perfectly indexed again! SHIM-DEX shims are reusable many times over. Index your spark plugs easily and effectively with SHIM-DEX!

"SHIM-DEX" Page 1 of 1

New (0)

On Sale (0)

Garage Sale (0)

  • Shim-Dex Spark Plug Shims, 24 Pack, Close Clearance
    Shim-Dex Spark Plug Shims, 24 Pack, Close Clearance
    x
                New close clearance shims, features a smaller  outside dimension for minimal seat surface. Perfect for All Pro style  heads due to the tight fit of the plug into the head. 

    These stackable spark plug shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees so that you get the most out of your spark plugs without causing overheat and pre-ignition due to thread exposure.
    • Shim-Dex shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees
    • You won't have to buy extra spark plugs to have them perfectly indexed
    • Shim-Dex shims are reusable many times over
    • Minimal or no thread exposure in the cylinder head that can overheat and cause pre-ignition
    • Shim-Dex shims are so thin they will not adjust the gap too far out of the combustion chamber and negatively affect performance
    • Pack includes 12 silver 60 degree shims and 12 black 90 degree shims
    • Works well with any V8 engine application
    Indexing Your Spark Plugs (PDF)
  • Shim-Dex Spark Plug Shims, 24 Pack
    Shim-Dex Spark Plug Shims, 24 Pack
    x
                These stackable spark plug shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees so that you get the most out of your spark plugs without causing overheat and pre-ignition due to thread exposure.
    • Shim-Dex shims rotate the ground of the spark plug at 30 degree intervals anywhere within 360 degrees
    • You won't have to buy extra spark plugs to have them perfectly indexed
    • Shim-Dex shims are reusable many times over
    • Minimal or no thread exposure in the cylinder head that can overheat and cause pre-ignition
    • Shim-Dex shims are so thin they will not adjust the gap too far out of the combustion chamber and negatively affect performance
    • Pack includes 12 silver 60 degree shims and 12 black 90 degree shims

    Indexing Your Spark Plugs (PDF)