This STC covers the installation of Lycoming O-360-A1A engines, with a Hartzell Constant-Speed propeller, cross-over exhaust system and modified carburetor inlet on your 108-Series Stinson. 

The Lycoming O-360 offers better performance, a 2,000-hour TBO, better serviceability, and it runs on readily available 100LL Avgas.

At $3.00 per gallon, you would save $1,800 in fuel costs over the life of the engine! As fuel costs go up, you'll save even more.

The price for this STC is $5,000, which includes the engine mount, baffling, exhaust header and a bound, detailed installation manual.

We're currently searching for a manufacturer for the exhaust system and carb inlet components, and will update this site as soon as we find one.