Originally Posted by Former_Boosted_IS
You are talking about the stock oil lines right, not the hoses provided with the STETT kit?
The lines are interchangeable from the AR and STETT kits on the thermostat side. I do not think the stock lines fit either. I have both kits. I didn't try the fittings onto the oil cooler but they are both SETRAB so I'm assuming they are the same as well. (Don't know if this helps you any.)