Drag the "Character_Steve_Boxing_Clean_Texture_P" into ~MODS folder.

D:\Steam\steamapps\common\TEKKEN 7\TekkenGame\Content\Paks\~mods

This mod replaces Steve's Boxing Outfit Texture.
Also replaces the thumbnails for each item replace.d 
This can be found in the Character Customizations.

Please enjoy! 
Any questions, please feel free to message me on steam or twitter.

Contact information: 
https://www.twitter.com/slawpro
http://steamcommunity.com/id/SlawPro/