The fuselage was of fabric-covered steel tube.
Aftermarket modifiers have obtained supplemental type certificates (STC) allowing conversion to an aluminum covering.
Many different engines have been installed in the 108 by STC such as the Lycoming O-360, Franklin O-350, Continental O-470.

One distinctive feature was the partial leading edge slot installed on the wings and aligned with the ailerons on the trailing edge, ensuring that the portion of the wing containing the aileron remains unstalled at higher angles of attack, thus contributing to docile stall behavior.

Total new production of the Stinson Model 108, by Stinson, was 5,260; this total does not include the two converted prototypes.
Stinson delivered approximately 4,935 aircraft and Piper delivered approximately 325 aircraft.
 Piper later sold the type certificate to Univair Aircraft Corporation.
Univair built and certified the model 108-5, but built only one example.
 Total new model production by Stinson and Univair was 5,261 aircraft.
The fuselage was of fabric-covered steel tube. Aftermarket modifiers have obtained supplemental type certificates (STC) allowing conversion to an aluminum covering. Many different engines have been installed in the 108 by STC such as the Lycoming O-360, Franklin O-350, Continental O-470.
One distinctive feature was the partial leading edge slot installed on the wings and aligned with the ailerons on the trailing edge, ensuring that the portion of the wing containing the aileron remains unstalled at higher angles of attack, thus contributing to docile stall behavior.
Total new production of the Stinson Model 108, by Stinson, was 5,260; this total does not include the two converted prototypes. Stinson delivered approximately 4,935 aircraft and Piper delivered approximately 325 aircraft.  Piper later sold the type certificate to Univair Aircraft Corporation. Univair built and certified the model 108-5, but built only one example.  Total new model production by Stinson and Univair was 5,261 aircraft.
Stinson 108