Application
The arm on the side with the small set screw (1.5 mm) is splined to the central shaft. This allows the installer to tailor the arm/pedal angle to suit their installation.
The countersunk capscrew (4 mm) which retains the side arm is installed at the factory with a small impact tool and can be quite tight. A palm-sized (or butterfly) impact wrench, or an allen wrench with a longer handle than is provided with the gas pedal, may be needed to remove this retaining screw for the first time.