Complex sentence: When Nismo released the Skyline GT-R R34 V-Spec complete car, the Z-Tune, because there was a limitation in the number of parts, Nismo was only able to create 20 of them.
Split into simpler sentences: When Nismo released the Skyline GT-R R34 V-Spec complete car, the Z-Tune. Because there was a limitation in the number of parts, Nismo was only able to create 20 of them.