The Harley-Davidson Breakout is the coolest ... But the combination of a modified air cleaner assembly and custom exhaust system (co-developed with KessTech) ought to make the big-twin breathe ...

Still, the greatest custom bike specialists out there ... There is a downsized air cleaner replacing the Harley’s chunky OEM item, which greatly improves the look of its rumbling V-twin powerhouse.

Then, the Harley’s forks got extended by four ... As far as the powertrain is concerned, NamiXII Design installed a custom-built air cleaner and some new exhaust pipework. The plumbing runs ...