The letter version is the newer one. When Harley updates a part that retro-fits the same part #s before it, they assign a letter at the end. If that part changed again, it would become 29782-07B. "Superseded" is the term used. The last two numbers represent the year that part was introduced.
The letter version is the newer one. When Harley updates a part that retro-fits the same part #s before it, they assign a letter at the end. If that part changed again, it would become 29782-07B. "Superseded" is the term used. The last two numbers represent the year that part was introduced.