Skyline GTR, The Skyline GTR is a truly remarkable car, which improves with tuning, this section contains product listings for parts to enhance the Peformance of your GTR, Unlock the true potential. Sunny GTI-R, The Sunny GTI-R, Nissan’s mighty pocket rocket, The GTI-R has an immense tuning potential this section contains product listings for parts to enhance the Peformance of your GTI-R.