Harley-Davidson Softail sprint bike by BG-Garage Custom

Bruiser: A Harley Softail drag bike from Belgium

We’ve followed the wacky Sultans of Sprint race series since day one, impressed by the outrageous purpose-built machines that some of our favorite custom builders have produced for it. But the series is much bigger than what we’ve touched on here. Because for every high profile shop or manufacturer with an entry, there’s a hidden…