Fox’s excellent tech video wiil give you the how-to.
http://www.ridefox.com/help.php?m=bike&id=576
Your specific question – they say the below – so I think you could assume that the 150s are 160s spaced down, but assumptions are tricky things. I’d maybe give Mojo a call.
2015-2016 36 FLOAT 170mm and 180mm forks can be reduced in travel down to 130mm.
2015-2016 36 FLOAT 160mm forks can be reduced in travel down to 110mm.
2015-2016 36 FLOAT 160mm forks CANNOT be extended past 160mm of travel.
2015-2016 36 FLOAT 180mm forks CANNOT be extended past 180mm of travel.
2015-2016 36 FLOAT 170mm forks can be extended to 180mm of travel.