Proform Engine Piston Ring Filer Manual Model Includes One 120 Grit Wheel Alum. Base 66785

• To assure proper piston ring end-gap, the piston ring filer enables the user to file piston rings quickly and accurately.

To assure proper piston ring end-gap, the piston ring filer enables the user to file piston rings quickly and accurately. Position the piston ring firmly against the dowel pins, crank the handle to turn the abrasive wheel. Using a feeler gauge, file the piston ring to meet the manufacturer's specification.