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
  • 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