When you fit a set of carbs you have no choice regarding the pulse fitting direction . t has to go where Mikuni told you its going. Well enough of that, we don't like being dictated to, so we changed it. The new wax racing billet pulse side of your Mikuni SBN carburetor allows you to change the direction that the pulse line comes out.
The unit come supplied with the allen key bolts to bolt it directly to your carburetor. Simply remove the stock pulse side and bolt this one on