Heavy Instrumentals

hmm... i'll do my best... though i think most of the ones i can come up with aren't that fast...

Arch Enemy - Stigmata
In Flames - Man Made God
In Flames - The Jester's Dance
In Flames - Wayfaerer


hmmm shit dude sorry that's all i got :S i don't know too many brutal instrumentals.
 
Satyricon - Part VII: Transcendental Requiem of Slaves

Katatonia - Inside The City of Glass (Not really fast, but it's pretty heavy)

God Forbid - God's Last Gift

Also check out Scholomance "The Immortality Murder." The second disc is all instrumental.
 
in flames (see bumble's post)

chimaira - implements of destruction....yea i know, chimaira suck but this song is fuckin good. Quite progressive, couldn't even tell it was them. It's a 13 minute instrumental