[Vision67]

The latest car and driver has an article on the SRT. Why the hell would Dodge use an Aluminum block with this type of performance. The current SRT-4 uses cast iron. Granted it's heavier, but it will withstand more punishment (ie, modding).

Actually, the benefit of using an Aluminum Block is that it matches the coefficient of linear expansion of the Aluminum Head; as they heat up, they grow at the same rate.

That means headgaskets will be much less likely to fail, and the stress from multiple heat and cool cycles will be less.

Bottom line: Better Durability