I am attempting to install 2015 mustang gt leather seats in my 05. Rear seat wasn't to hard I reused the 05 frames and used the 15 foams and leathers I am shocked how well everything fit. The lowers I had to cut a couple new slits into the frame to match the 15 leather attachment points. I will update tomorrow with the fronts. The rears tool about 1-1/2hr but I have one hell of a hangover . The front I have seen people install so it doesn't look to hard.