Editing GM High Feature engine (section)

==Holden High Feature engine==
{{unreferenced section|date=March 2023}}
[[Holden]] sold a HFV6 engine under the name '''Alloytec'''. The High Feature moniker on the Holden produced engine is reserved for the twin cam phasing high output version. The block was designed to be expandable from 2.8&nbsp;L to 4.0&nbsp;L. High Feature V6 engines were previously produced in Fishermans Bend, [[Port Melbourne]], [[Australia]], and remain in production at the following four manufacturing locations: [[St. Catharines Engine Plant]], [[St. Catharines]], [[Canada]]; [[Flint Engine South]] in [[Flint, Michigan]], [[United States]]; [[Romulus Engine|Romulus Engine Plant]] in [[Romulus, Michigan]]; and [[Ramos Arizpe Assembly|Ramos Arizpe, Coahuila, Mexico]]. The assembly lines for the St. Catharines and Flint facilities were manufactured by Hirata Corporation at its powertrain facility in [[Kumamoto, Japan]]. Most of the designs of this motor happened in Flint. They were first produced for the Cadillac range.{{cn|date=March 2023}} The engine block and cylinder heads are cast at [[Defiance Foundry]] in [[Defiance, Ohio]].