RWA 2230 rear lowering blocks are made of billet aluminum and precision machined. The blocks are designed to replace the stock rubber bushings at the spring/U bolt mount and will lower the rear of the car between 1"- 1 1/2". By removing the rubber bushings, spring wind up and axle hop is also reduced.  Specify what year Pinto you have and we will supply the correct blocks. 71-73 require round locating pad and the  74-80 require oval mounting pad. The stock U bolts can be retained. Sold in pairs.