The Right Tool For The Job. Simplify installing the manual transmission in your Pony with an SR Performance Clutch Alignment Tool. This is the perfect tool for precisely centering the clutch disc into position, helping to avoid a misalignment that can lead to costly damage. Quality Construction. Constructed from a durable plastic composite, this SR Performance Clutch Alignment Tool features a 1-1/16" outer diameter with a 10-spline design, making it ideal for 10-spline Mustang clutches. Application. This SR Performance Clutch Alignment Tool is designed for installing 10-spline clutch kits on Mustangs equipped with a manual transmission.