0 Caterpillar C12, , Heads, Fits to: , Brand New C12 LOADED Stage 2 Cylinder head. They are better than OEM quality containing 5% more nickel content in the casting material. This additional nickel content prevents the cylinder head from cracking in between the valves. Additionally, the coolant passages have been enlarged by 30%, and inner ribs have been reinforced to reduce heat stress. This stage 2 cylinder head is an upgrade from the standard cylinder head. The difference is that the exhaust valves in this cylinder head have all been upgraded to inconel valves. This major performance improvement increases the capacity of the valves to endure higher temperatures as well as heightened pressure. Replaces 148-2144 0R-7439 0R-8255 0R-8395 0R-8434 0R-8754 0R-8756 0R-9749 0R-9750 0R7439 0R7440 0R8255 0R8395 0R8434 0R8754 0R8755 0R8756 0R9748 0R9749 0R9750 10R-8883 10R-8884 10R-8887 10R-8888 10R8883 10R8884 10R8887 10R8888 116-1079 116-1084 116-1085 116-5369 1161079 1161084 1161085 1165369 126-0140 126-0141 126-0142 1260140 1260141 1260142 130-0, Serial# A1620683CRG, ,
