phil i seen 2 versions in the d4d box 1 confirmed from a wreck c53 sadly it had a narrow center casing making me believe its narrow inside that box was used for just a bel swap so did not inspect propper inside to measure the other box landed at my door with my friend that 1 was wide center casing and had wider gears code of box ??? but deffo was .7 gear set on the 5th gear 29 and 40 count i used the 5th gears out of 1 of my oem lsd boxes ( also 29 / 40 ) and fitted that to a turbo box with no issues not al oem lsd come with 0.7 neither