No such thing as a HD antenna.
My 2007 23SS has a crank up batwing antenna and I get HD shows.
It's the tv that makes it HD, not the antenna.
You can use rabbit ear antennas to get HD tv.
Your 2013 probably has the batwing antenna.
Look for a crank in the ceiling.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC