i had to search because I had never heard of an sf5(SF5) Forester. Seems that's a chassis designation. Can't imagine any practical use whatsoever in knowing the brake horsepower but you will have to specify the model year. When you have that, you can skip the middleman do the search yourself on Google.
Subaru Forester was created in 1997.
Subaru Forester has a timing belt.
The 2005 Subaru Forester has 16 valves.
The 2009 Subaru Forester has 16 valves.
The 2008 Subaru Forester has 16 valves.
The 2001 Subaru Forester has 16 valves.
The 2004 Subaru Forester has 16 valves.
The 2006 Subaru Forester has 16 valves.
The 2011 Subaru Forester has 16 valves.
The 2002 Subaru Forester has 16 valves.
The 2014 Subaru Forester has 16 valves.
The 2010 Subaru Forester has 16 valves.