This manual is specifically for the 2015 FLHXS Street Glide Special, but the 2016 model is nearly identical mechanically and electrically. Harley didn't make major changes between those two years. So yes, for most service and repair procedures, this manual will still be very useful for your 2016.
That said, if you’re working on something year-specific like certain emissions components, updated infotainment software, or minor wiring tweaks, just keep an eye out for small differences.
Overall though — yep, this manual should have you covered just fine 👍🏻
