Billet Boss started as Williamson Engineering. A family run Australian business operating for over 90 years.
Specialising in precision machining and engineering, in the late 1990’s its main business was focused on the mining and steel processing industries.
In the early 2000’s we became involved in high performance yachting, having great success in the Volvo 70 Around the World Ocean Race’s and many annual Sydney to Hobart yacht races.
In the background we were modifying / manufacturing high performance automotive and marine parts.
In 2018 we focused on the manufacture of high-performance Mazda rotary engine parts. We continue to expand our range. Our parts have contributed to world breaking records and continue to do so. Billet Boss has made a full billet 6-cylinder RB30 block that has run a 5 second pass.
We also manufacture parts for all types of fast watercraft including Formula 1 tunnel boats, ¼ mile drag boats and ski racing boats to name three.
If it is supplying our own designed products or manufacturing custom parts as requested to the highest of standards/specifications, our passion is to help our customers get in the winning circle and take a spot on the podium.



