High compression engines run better with the spark plugs indexed. This way spark plugs can be properly set so there is no piston dome interference.

Features:
Fits 14mm Spark Plug Threads
  • Made from High-Quality Aluminum
  • Red Anodized Finish
  • PROFORM Parts Brand Product
  • Sold Individually
  • More From This Category

    Proform Thread Chaser/Cleaner, Double Ended, 14mm and 18mm Thread, Steel, Each

    Proform Thread Chaser/Cleaner, Double Ended, 14mm and 18mm Thread, Steel, Each

    $15.48