Head Hoggers ported FBW TB. (11-up)30 Dec, 2016 in Head Hoggers tagged harley engine kits / harley engine machining / harley engine performance / harley head porting / harley throttle body porting / Head Hoggers by headhoggers (updated 2844 days ago) Here is some pics of our TB porting service. This is a 11 up style FBW TB.