Quote Originally Posted by VRaptor SpeedWorks, LLC View Post
I dont' think the heater core hook-ups are AN.....It's been a while since I installed a set of those tubes, but I was thinking they are O-ring sealed, much like the evaporator core?
We don't have a heater or AC in the race car so I have never seen the Vintage Air GTM heater core. Are you saying that the inlet/outlet to the core is not a tapered sealing surface type of fitting? Almost all those tube fittings I have seen of that style are flare fittings. IIRC some use a JIC flare angle and some use the AN angle, but both will work with each other in low pressure applications.