Spark Plugs - AC Delco R42XLS

Compatible with NGK BPR6ES, Autolite 63 or 4263, Champion RN9YC, Denso W20EPR-U

Price is for one plug.

Thread Size: 14 mm
Thread Reach: 19.05 mm (0.75 in)
Hex Size: 21 mm (13/16 in)
Heat Range: 2 (ACDelco scale)
Seat Type: Gasket
Factory Preset Gap: 0.89 mm (0.035 in)