Metallica – Whiplash
Released 8 VIII 1983 (in North America)
The title song, that was included on Vinyl editions of this single ISN'T really a remix. In fact, the only major difference is that version is FULLY standalone (album version on other hand, was merged with the end of "Anesthesia [Pulling Teeth]").
Cassette editions (released 2 years later) included "Anesthesia [Pulling Teeth]" (which was [like the album version] merged with the titular song).