94' Volvo 850 Turbo Cylinder Head Cryo Treatment

[Baptiste1106]

So i've determined my exhaust valve stem seals have worn due to oil seeping past the exhaust manifold gasket and the slight oil smell out of the exhaust tail pipe. So i might as well do a head gasket job. I also found a cryogenic place who will cryo my newly assembled head for $100, good deal or no ? The closest factory from NYC is there burlington MA location (781) 270-1180.