All the trackers in the photos are IFS and steel diffs (either Calmini anvil or Stick Grand vit, or homemade 7.5) with a toyota CV conversion that a guy in our club makes. The toy CV conversion is about the same strength as doing a toy axle swap to a sami.
Note: Notice the size of tires and lifts despite IFS.
Front: Calmini prototype center mount Anvil front diff -Detroit locker- Custom CV shafts 40% larger and 40% longerhttp://www.rpm4x4.co...unk-tracker.htm
Front: Powertrax Lock Right
Hybrid front diff 7.5 ring gear
Pic1, Pic 2, Pic 3
Build your own strengthend CV chafts for the front end.
I know there are strong IS systems out there. One guy even ran 4WIS on a competition rock crawler. Those are not practical applications for people with Subarus. Let's face it; if you could afford those you wouldn't be driving a Subaru. What RPM is doing is practical and doable for the weekend warrior on a budget.
Now lets fantisize a bit about if someone actually did this with a Subaru. Couple it with the accomplisments others have achieved with a subframe lift and a divorced transfercase. This would bring Subarus into the realm of 36" tires, 4:1 or 6:1 low range, and lockers front/rear all without solid axles.
I've heard it here for years... "if only we had real offroad upgrades or aftermarket support to take Subarus to the next level." Sorry but they aren't going to do it. YOU have to do it... you CAN do it!
My friend Archemitis said it best.... "rage it!"