The SPA wastegate mount was developed to locate the wastegate away from the direct heat of the manifold. The mount is cast from the same material as our manifolds. It will accept 2 bolt 38mm wastegate valves.
SPA Turbo exhaust manifolds are precision CNC machined from high quality ASTM 536 60-40-18 cast iron.
These are ductile spheroidal (aka Nodular iron) castings, where the graphite components are spheroidal in shape and essentially free of other forms of graphite.
Specifically designed for pressurized components and high operating temperatures.
In other words, the ideal material for turbo exhaust manifolds; - also used for high quality cylinder liners.
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