Indeed, with some having great results.This has me intrigued.
To save me reading reams of pages, is the objective merely better intake airflow? (which should equate to better performance I realise).
Although the Viking Mod and Factory Pro mod are very different in terms of filtration and airbox work. They do however share the same settings for the initial carb setup.
The Viking MOD also relies on you lifting the tank a couple of mill, intern allowing more air to reach the filter.
The Factory pro kit doesn't rely on increased volume of air instead opting for a less restrictive route from box to engine.