107″ under way on brand new 2016 RG. 21 Jul, 2016 in Head Hoggers tagged harley engine kits / harley head porting / harley machining / Harley Performance / Head Hoggers by headhoggers Bike was shipped in for one of our 107″ kits. Getting the top end and cams works. Stay tuned for progress pics. Should be pretty nasty.