Spark Plugs - Baywindow Bus Mar 22, 2022 18:09:58 GMT -8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by busaddict on Mar 22, 2022 18:09:58 GMT -8 Are these suitable for a 1700 bus engine? Digging through the spares box, I think I got these from HTR a few years ago. NOS Champion RN12YC from 1984