Yes they do but any build that HD has also states for "RACE APPLICATION ONLY" so that means you are running full throttle more often than not.
The stock injectors work just fine with a 58mm TB if you use the right EFI map and the only thing it would affect would be the top end performance.
In all reality the 50mm TB works just fine on any 103 stage 4 build.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.