Detroit 12.7 STAGE 3 Cylinder Head

This Stage 3 Detroit 12.7 Cylinder Head features Grey Iron casting, Inconel exhaust valves, and a Stainless Steel Fire Ring on each cylinder, suitable for heavily modified trucks.

• The description claims that the Inconel exhaust valves are more resistant to heat.
• The description claims that the Fire Ring helps prevent the head gasket from blowing at high temperatures and pressures.