Torpedo is an "Extra IPA"
IBUs around 78-80
Bittering hops: Magnum
Finishing hops: Magnum, Crystal, Chinook.
Torpedo: Magnum, Chinook, Citra
More info here and here.
On the Citra hops, sierranevadabill says this on beeradvocate.com:
As far as we know Torpedo will be the first bottled beer EVER to include Citra hops, widely available or otherwise.
We are using Citra in the torpedo because it is not only a really unique flavored hop but also has a ton of alpha-acid...I think 12% don't quote me though. The flavor os somewhere in between the crazy-tropical mango flavor I described, but if used too much, Citra can crank out an intense "catty" flavor... Like Simcoe on steroids.
As the previous poster stated, with a late hop addition, the hops are still subjected to hot wort, therefore, extracting some bitterness. That is, not necissarily why we're not using there, though. i think I mentioned earlier, that there ar only about 3 acres of this hop anywhere in the world. There just isn't that much of it to go around. I was in our hop freezer this aftyernoon, and we have a solid 250lb bale. I think that's it. Total. End of story.
We are using citra in a way to get the most bang for the buck, so to speak, and blending it in with many different hop varieties in the Torpedo for added hop complexity.