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QA1 Rear Pro Coilover Kit - Single Adjustable, 150 lbs/in Rate - 1964-1972 Pontiac LeMans 718 Spyder 1999 Mazda Roadster SQA1 offers bolt in Rear Coil Over Conversion Kits for the 1964 1972 Pontiac LeMans vehicles. These kits include specially designed USA made mounting brackets and single or double adjustable Aluminum Shocks, High Travel Springs and all necessary hardware. Single Adjustable Shocks provide 18 positions of simultaneous rebound and compression adjustment while QA1's double Adjustable Shocks provide 18 positions of compression adjustment and 18 positions of