Spark Plug Index Washers Flat Seat

The Spark Plug Index Washers Flat Seat by MOROSO (MPN 71910) is a precision-engineered set of 30 indexing washers designed to optimize spark plug seating and performance specifically for high-performance and racing engines. These flat seat washers ensure proper spark plug alignment and gap consistency, which are critical for reliable ignition timing and engine efficiency.

Engineered with precision tolerances, these Spark Plug Index Washers Flat Seat feature three specific thickness options—0.043 inch, 0.050 inch, and 0.064 inch—allowing technicians to achieve exact spark plug depth and indexing angles for maximum combustion efficiency. The 14 mm flat seat design accommodates standard spark plug seats while maintaining concentricity and preventing electrode deflection.

Professional engine builders, racing teams, and serious enthusiasts rely on indexing washers to standardize spark plug installation and optimize combustion chamber conditions. The included variety of thicknesses accommodates different cylinder head designs, ensuring precise fitment for 14 mm flat seat applications.