The AC AERO CENTURION™ liquid cooled cylinders are a game changer for the decades of cooling challenges that have faced the GA market and aviators.

A complete kit that comes with AC AERO Liquid Cooled Cylinders, Hardware, Plumbing, Pump & Pump Circuit. Wrist Pins. Choose AC AERO liquid cooled cylinders for increased power and weight savings.

Increase your power

Liquid cooled cylinders offer a substantial improvement over air cooled cylinders in power output and wear characteristics. The Gladiator product line in addition also boasts substantial weight savings over the stock cylinder components. 


The big brother to the Gladiator. Individually and custom built for each and every customer. We can recondition your existing Lycoming 540 engine and convert it to a lighter and more powerful Centurion 583ci / 350hp. We also have an option for phase II customization and can offer the CENTURION RS660ci in both NA and FI versions.

Air cooled engines are usually run rich during take off and climb, it is not unusual to run some air cooled engines at BSFC’s of .65 and even more if turbocharged. Liquid cooled engines can be run at best power without the need to cool the engine with fuel. By running liquid cooled cylinders we can close up the tolerances and thereby reduce blow-by gases and harmful emissions, at the same time realizing higher output due to better detonation margin.

Advantages of liquid cooling:

  • Increased power output
  • Lightweight design
  • No airflow and baffling cooling difficulties
  • Uniform cooling, no shock loading
  • Reduced oil consumption
  • Lower emissions
  • Lower fuel consumption
  • Increase in detonation margin
  • Better and lower wear
  • Longer Service life

Note: Centurion RS model shown above.



The beauty of the Legion 613ci kit is that it can also be combined with our Centurion™ Liquid cooled cylinders for even more performance, weight savings and POWER. 




The Hawk E330 is designed as a replacement for 6 and 8 cylinder Lycoming’s and 6 cylinder Continental engines, an alternative with 300hp-500hp weighing in at just 132kg (301.4lbs) including gearbox.

Designed to run on industry standard Jet Fuel (Diesel [EN 590], Jet A, Jet A-1, DEF STAN 91-86, JP-8, DEF STAN 91-91, JP-8+ 100, Chineese Jet Fuel No.3) Will also run and peform on all gasolines where necessary, 80, 87, 91, 95 including 100LL along with bio derivitives.