Indexing positions the ground strap of the spark plug properly for best piston dome clearance and unshrouds the electrode for a more even burn and possible gains of 5-15 horsepower. Works with flat gasket or taper seat 14mm spark plugs. Includes instructions.;.
The Allstar Performance ALL96510 Spark Plug Indexer Tool is ideal for mechanics looking to service engines efficiently, as it accommodates 14mm flat/tapered spark plugs.
