I keep hearing about it and know what it does but I don't know what pack does it come with?

So far none of my ships have one

Also is there a way to look up what pilots/upgrades come with each pack ?

You get 2 in the Slave-1 set.

I have a spreadsheet that works out how many of each card you will have. If you click on the box for number of card it will bring up the formula to calculate it, which should make it obvious which sets you get it in. EG. Proton Torpedoes returns "=Core_Set+XWing+(2*YWing)+BWing" so you get one in the Core Set, one with the X-Wing Expansion, two in the Y-Wing set and one in the B-Wing.

http://www.nezumi.me.uk/Rebel_Scum/X-Wing_Collection_Tracker_Names.xls

Firespray has 2. Not that I know of.

You get 2 in the Slave-1 set.

I have a spreadsheet that works out how many of each card you will have. If you click on the box for number of card it will bring up the formula to calculate it, which should make it obvious which sets you get it in. EG. Proton Torpedoes returns "=Core_Set+XWing+(2*YWing)+BWing" so you get one in the Core Set, one with the X-Wing Expansion, two in the Y-Wing set and one in the B-Wing.

http://www.nezumi.me.uk/Rebel_Scum/X-Wing_Collection_Tracker_Names.xls

Thanks for using names in the spreadsheet.

Also you can see a list of cards and expansions here:

http://www.afewmaneuvers.com/topic/573-full-card-list-by-expansion/

http://fabpsb.free.fr/extensions.php?lng=en

http://geordanr.github.io/xwing/