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1-13/16-20 in Inlet / Outlet
1968-1974 GMC K35/K3500 Pickup
Carburetor Inlet Straight
1967-1967 GMC P15/P1500 Van
1959-1974 Buick LeSabre
Allstar Performance Spark Plug Indexing Tool 9510CD 1-13/16-20 in Inlet / OutletIndexing positions the ground strap of the spark plug properly for best piston dome clearance and un shrouds 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. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over
