Raised intake D port floor alum shoes and teflon heat insulating gaskets (2 ea) for RH10 and all 30mm port heads. Some raised porting is required to increase performance with small ports.

This shape is taken from the world famous Harley XR 750 flat tracker. The intake port floor is raised for increased velocity and flow, allowing for a fuller intake charge. Made of alum. An easy drop in kit but some raised porting at 10:00 and 2:00 near the guide is required for increased performance with small ports (see instructions).  The biggest performance bang for the buck you can get for your Norton.  Two reusable teflon heat insulating gaskets included (more images) (installation instructions).