set of 4 plugs AC Delco R41-5TS New old stock Listing is for a set of 4 spark plugs. AC Delco R41-5TS M14 x 1.25 thread Thread length 11.2mm Conical / Taper seat 5/8” or 16mm hexagon socket Cross reference Champion BL9Y Bosch H6BC NGK BP6FS Bedford CF all models Vauxhall Viva Chevette Magnum VX1800 Firenza. Please check fitment for your vehicle as these plugs are only suitable for certain engine model years e.g. 1600 1800 2300. Not suitable for the 1200cc Viva and Chevette engines.
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