Just installed these. Whiteline does not list a fitment for a 2012 Gen coupe base but I found the current generation Camaro is also a 380mm end link. The difference is the Camaro has 10mm stud to attach to the car and the our cars are 12mm. Contacting Whiteline, I asked if they could substitute the ball joints on the end of the links with 12mm stud instead of 10mm which they did.
Don't know how many models of Coupes use the 380mm links, but these work fine for me. They are adjustable, but the shortest length they go is the same length as my stock links, they will go longer.
A quick check I do after installing end links is, with the car on the ground, I turn the wheel to full lock in one direction and reach for the center section of the link and try to twist it. The ball joints should allow some movement, if not it is binding and could cause nuts to loosen or part breakage. Check both sides then turn the wheel to opposite lock and check again.