I just googled your question and there is a suggestion of 169 teeth required on at least a few of those models.
The twin cam models have a fairly wide belt which can seem short to the uninitiated and they can be a struggle to fit. If your 162 tooth belt nearly fits then perhaps you aren't trying hard enough.
If the 162 tooth belt is short by a long way then maybe you need 169.
The best way to be sure is count the teeth on the original belt.
Answers & Comments
I just googled your question and there is a suggestion of 169 teeth required on at least a few of those models.
The twin cam models have a fairly wide belt which can seem short to the uninitiated and they can be a struggle to fit. If your 162 tooth belt nearly fits then perhaps you aren't trying hard enough.
If the 162 tooth belt is short by a long way then maybe you need 169.
The best way to be sure is count the teeth on the original belt.