I've been running my ax15/np241/d300 doubler for a couple years now and it's been great. Only complaint I have is that the intergraded doubler is way shorter than the normal toy case doubler. Made drivelines a little more of a pain but not a big deal.
For the round 6 bolt pattern and jeep style 23 spline output. Was able to do it all with factory parts. Also the 241 is way stronger than a rf1a for a doubler. Main reason was to get rid of the intermediate coupler that I keep snapping the rear input off. Front digs was a bonus.
YotaAtieToo
Thick skull
He doesn't even know. Just panicking and buddies telling him he's just going to break them every time out.
It's 40s and 4.88s, asking for trouble with Toyota cases imo.