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Designed for Harley-Davidson XLH (1967-1976) and XLCH (1970-1976) models
ensuring a perfect fit for the rocker base cover
Easy to install with seamless integration into existing systems
Factory-matched colors marked with "ORIGINAL"
Force air intake ports for increased circulation and fog resistance
NGK 1223 CMR6A NICKEL SPARK PLUG 2006 Lincoln Navigator Designed for Harley-Davidson XLH (1967-1976)NGK Standard Series spark plugs are designed for stock replacement applications. These plugs have a hotter spark, which means better combustionand that improves performance, while producing less harmful emissions. They're available in a variety of options for both universal and specific vehicle applications. Get the spark plugs used by winning racers: NGK Standard Series.