Spied! Porsche 911 GT3 RS Prototype Caught Cold Weather Testing by | Dec 12, 2014 | News | 0 comments A prototype for the 991-generation Porsche 911 GT3 RS has been spotted cold weather testing in the snow. A prototype for the 991-generation Porsche 911 GT3 RS has been spotted …read more Share this:FacebookGoogleTwitterPinterest Submit a Comment Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.