CTE for Si Mo cast iron/steel

[Deude_Mann]

I am looking for a CTE for a material that is referred to as 'high Si Mo cast iron' and some refer to it as 'cast steel' though that may be a misnomer. This is a casting alloy commonly used to cast modern exhaust manifolds for gas and diesel engines. For example this is reportedly the casting alloy that GM used for the factory exhaust manifolds for several of the LS family engines. I would like to know the CTE at elevated (service) temperatures as well.

I have found a few answers here and there but they are not very consistent.

Thanks