There is a .6 oz. weight savings compared to factory supplied insulator.

I opted not to bother with routing a pulse port thru the insulator. Last one I drilled to midway 3/16"on beraing surfaces and then drilled intersecting holes from the sides and then tapped the holes and inserted small setscrews with sealant.

Is there a preferred location to drill and tap the case for a pulse fitting, like the type used on glow mufflers?