if the kit is for a std bosh injector set then the seals will at least fit, but the spacers, filter baskets and pintel caps may not fit. there are several different styles of bosch injector which differ slightly at the tip end. but as long as your old bits are ok then just swap the seals over.
if it was me though i would get another set of injectors and get them professionally cleaned then do the seals when they come back
