ok so this thing is the biggest problem ive have with the car, since i've owned it i've put 2 into it, i just put another one on it and the piece itself isnt leaking, its the o-ring that goes between the flange and the hard pipe to the rad. its rather fat and slightly smaller in diameter than any that i can find, bought the one from ecs that says its fits most coolant systems or whatever and its the not the right thing either, anyone even found one of these? or is it gonna be a dealer thing?

 

I got one that came with my Head Gasket kit from ECS but idk about ordering it separately. Try partsgeek.com I get lucky there sometimes