Maximize performance, improve safety, reliability and longevity. It is our mission to move away from the costly and destructive aspects of leaded gasoline.  Andrew Higgs. President | AC Aero

HIGGS Diesels

The Higgs Diesel! These V4 Hawk and V12 Condor configurations come with improved mission performance and payloads. Known as the E1000J/G Series or CONDOR and E330J/G HAWK Series

AX40/50 Cylinder Kits

Turnkey cylinder upgrades for your Lycoming 320/360/540. Complete with top end and suitable for your existing hardwareKnown as the AX40 and AX50 Cylinders Kits

RS Series Engines

Built to custom specs! Our RS Series engines use our AX40 and AX50 cylinder technologies. These are turn key powerplants designed to your mission spec. Known as the RS Series

Liquid Cooled Lycomings

New Liquid Cooled Cylinders. Cylinders for both 4 Cylinder and 6 Cylinder Lycoming models. Known as the Gladiator (4-Cyl) and Centurion (6-Cyl) Series

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