Look here for the tools you need http://www.parktool.com/category/bottom-bracket

1 - BBT-2 + either a 32mm wrench or 3/8 drive ratchet driver for the bottom bracket, CCP-44, for the crank you will probably need an 8mm Allen key for the dust caps as well

2 - BBT-9 Bottom Bracket Tool + 6mm Allen Key

3 - Bottom Bracket as for your GIGA Pipe, CCP-22 for the crank. http://www.sram.com/_media/techdocs/...wrspl-e-r2.pdf

For how too's http://www.parktool.com/blog/repair-...ottom-brackets