New leaf spring shackles are available for 49-51 cars. (49-50 pictured) 51' shackles can be used on 49-50 models to lower the car another 1". 49-50 shackles cannot be used on 51' models. Prices: 49-50 are $30 per side. 1951 are $10 per side, both include new bushings. Call 800-732-6029 to order