HDES-16B FLO Headworks Cast Iron Valve Guide Installation 

After testing four different types of Bronze Guides, we found that all Bronze Guides would attract excess carbon and seize the exhaust valve stems. Cast Iron was the only way to go with 7 degree nose angle.
Watch Perry Kime install these Cast Iron Valve Guides at 450 degrees F. in part 16B of this step-by-step journey in the FLO Headworks Machine Shop.