Well, basically it is a solid CNC'd billet aluminum piece, so it is stronger that way, and it also is designed to be like a mini-daytona pinion support by having a bigger inner bearing.
This support uses a standard 8" pinion bearing behind the yoke and a standard 9" pinion bearing for it's inner bearing.
How much does it actually help...well we are not really sure as far as numbers on paper. We've never broken the pinion support - but basically only because the pinion support is way stronger than the 8" gear case at that point. We would still only rate the complete 3rd. member with the V-8 style gear case, billet pinion support, and all the good new internals at about 300 h.p. max.
Even with all of the super trick parts we make for the 8" 3rd. member, I cannot honestly build one for you that I can assure you will not fail. They are nice, by all means, they are the nicest 8" parts on the market, but they are just limited by physical size of the parts.
To install the pinion support, you would need the support, the bolts for it, a pinion depth shim kit, a pinion seal, an o-ring, and a minimum of the new bigger inner pinion bearing - but you would definitely be wise to change the outer bearing too when doing a new pinion support with a new race in it.
Thanks.