Every great Hardtekk track needs a shouted, unintelligible command. The 2021 packs were infamous for their "Vocal_Shouts" folders containing phrases like "Gib Gas!" (step on it), "Vollkontakt!" (full contact), and "Arsch auf Grundeis" (ass on bottom ice).
Many underground producers release free "DL packs" via ToneDen or Bandcamp links in their track descriptions. hardtekk samples pack 2021
For those just starting, free resources are available to help build a library: Every great Hardtekk track needs a shouted, unintelligible
Hardtekk Samples Pack 2021: Building the Ultimate Underground Sound "Vollkontakt!" (full contact)