I'm not sure why you'd want shift extenders in the first place as I find the regular set up very easy to use. Personally I think fitting that size of extenders will make it all feel slightly cumbersome & they'll get in the way. However if you're set to do it then I agree that particular set of aluminium (or aluminum if you prefer) extenders does look off, darn right cheap & nasty looking if truth be told & nothing like a match for the original material. The carbon looks better but will look somewhat at odds with your interior. I think if I were in your position & really wanted to extend them, then I'd wait until I found a better looking product that matched the original material & was also a little smaller.