User blog comment:AdrF12/Cards not to fuse in A8/@comment-34346976-20180810085956/@comment-34790291-20180811004957

Sure, but I often fuse class A and C parts (suspension, exhaust, etc) because I frequently get them from boxes, and I don't really need to upgrade any of my class A or C cars yet. Tech cards are the ones you should never fuse.