Carb Spacer 4150, Sportsman Combo - This spacer set consists of one 4-hole and one open spacer. The 1" thick, billet aluminum, 4 hole spacer has a 7 degree taper through the smooth walled holes; it is for a 1.688" butterfly. The open spacer is also 1" thick, billet aluminum, with a 7 degree taper through the smooth hole.
Here is a view to highlight the taper.
Here is a detail of a typical smooth wall.
Here is a top view.
Here is a bottom view.
Please allow 1-3 weeks delivery depending on inventory.