Who are the Big 4 thrash bands?

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Tags

1. #anthrax
2. #testament
3. #followed
4. #mainstream
5. #bands
6. #festival
7. #heavy
8. #megadeth
9. #slayer
10. #exodus
11. #overkill
12. #would
13. #angel
14. #thrash
15. #death
16. #metallica