My combination MK4/coyote/T56/15+IRS.
FFR does not make a drive shaft for this combination. My measurement is 8-516" from the adapter on the IRS to the end of the transmission shaft. The dust boot lines up with the end of the transmission shaft. What length drive shaft has been used with this combination?

I have a 10.5" FFR shaft that was sent with my kit. i am considering having it shortened.

Thanks