High quality NGK ZFR5N spark plug set to suit all Slant 6 225 engines. There are actually an early-mid 90's Jeep Cherokee spark plug but a performance plug for the Slant 6 engines as they are a long reach plug meaning they sit as close as possible in the combustion chamber for a short, clean spark compared to standard spark plugs.
Please note: For the most optimum performance, it is highly recommended that you remove the crush washer prior to install. The plug will not touch the piston as the guide tubes act as the washer/spacer!
