Use the alignment tool supplied in the clutch kit to hold the disc in place during installation. Our S.P.E.C. disc is clearly labeled "TRANS SIDE" and "FLYWHEEL SIDE" to make sure it's installed properly. When bolting the pressure plate into place, carefully wiggle the alignment tool and clutch disc to assure that the disc is perfectly centered. Then, after torquing the pressure plate bolts, test-fit the alignment tool one last time to assure that it slides smoothly through the splines and into the pilot bushing.