As great a car as the Datsun Z was and is, a big part of Mr. K's legacy is the growth in the Japanese import performance tuning industry that the Z inspired.
From the Chevy re-engined Scarab conversions to the Eagle/Alpha GTO rebody kits; the four decades after the arrival of the first Z in the USA saw hundreds of small manufacturers spring up to supply mechanical and design upgrades to Z enthusiasts. Many of those shops expanded to cover other Datsun models, and even vehicles from other import manufacturers.
Nearly forty years after the last S30 Z was built, Greg Ira won an SCCA national championship in one and continues to set track records, utilizing performance mods and upgrades inspired by the Z itself.
Many other Z racers and driving enthusiasts across the country and around the world still seek out the same improvements, as well as innovating new ones.