Join Date: Jul 2009
Location: Silo'd in SD, USA
I've used them plenty. They are no substitute for a fully heated manifold.
In application they were used for cold starting only. In practice, they heat-up near instantly. In my experiences, they can be beneficial in extremely cold climates if used with heated intake air.
Imaging: if usages elsewhere with this piece are showing strong and positive results, ..imaging what a fully heated, port-tuned, unitized manifold would show for results.
A good piece to consider using if riding in single digit (or less) temperatures where it can be truly appreciated. Of course, this assumes use of a fully heated manifold with heated intake air in use with it.