Forced margin on right side that shouldn’t be there.

I’m having trouble figuring out why my content has a forced margin to the left. Where in the settings can I fix this?

See this url and scroll down to the widget below “Shop By Vehicle.” It’s likely the widget with the 3 images is where the problem is but I can’t find it in settings.
http://tbarnett.weeboweb.com/

Any help would be greatly appreciated.