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Do yourself a favor and download these mods:
K.C.C.E 
Khajiit Lion Mane Wigs n Hair Expansion n addons
High Poly Male Lion-Khajiit Racemenu Chargen

Requires High Poly Head
For KCCE you need to install only regular not Khajiit Overhaul patch or the new sliders won't work

To actually sound like a lion download this:
Sound for Khahiit Character male and female