Champion XE-49 Spark Plug

Champion XE-49 Shielded Spark Plug, a vintage 18 mm shielded ignition component identified for use in 12-cylinder diesel military trucks such as the M88A1. The XE-49 designation appears in Champion’s industrial spark plug catalog, and sellers describe the plug as New Old Stock, underscoring its status as a period-correct component rather than a current production item. This shielded design is specified as 18 mm in diameter, indicating the body style and mounting size associated with older Champion plugs used in rugged military applications. As part of Champion’s legacy lineup, the XE-49 is sought after by restorers who aim to maintain authentic components for vintage military vehicles. Because the part is tied to a 12-cylinder diesel truck application and explicitly labeled as shielded, it is most appropriate for preservation projects where exact XE-49-type plugs are specified by the vehicle’s service history or restoration guidelines, such as those encountered in the M88A1 and similar platforms that relied on 18 mm shielded plugs for period-correct authenticity.