the 4cyl shafts will slide into the v6 3rd and the v6 ifs rear end shafts will slide into the 4cyl 3rds. the 4cyl shafts will not slide into the ifs rear end because there to short. there all 30 spline though.
I think you mean 4cyl SFA rear axles won't fit in any IFS rear axle housing...they did make IFS 4cylinders.
