0 Caterpillar 3406B, , Heads, Fits to: , Brand New Caterpillar 3406B LOADED Stage 2 Cylinder Head with Square ports 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. OE Reference: 0R-0911 0R-0977 0R-1158 0R-1445 0R-3671 0R-3673 0R-3674 0R-3676 0R-3719 0R-4918 0R-4920 0R0911 0R0977 0R1158 0R1363 0R1445 0R2173 0R2671 0R2880 0R3033 0R3034 0R3671 0R3673 0R3674 0R3676 0R3719 0R4918 0R4920 0R9472 0R9473 10R8845 10R8846 110-5095 110-5096 110-5097 110-5099 1105095 1105096 1105096RN 1105097 110, Serial# 7W2203, ,
