msd Timing twister

lookin to order one for my truck...but one thing on the site it shows 2 different ones...
one part# listed for Ls1 Ls6 http://www.summitracing.com/parts/MSD-8625/

other part #for Ls2.... http://www.summitracing.com/parts/MSD-86251/?rtype=10

what would mine fall under or which one would work?engine is 08' 6.0 Ly6

the LS1 and LS6 are gen 3 while the LS2 is gen 4. The LY6 is gen 4.

cool man looks like ima order this :)