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The QA1 Pro Coil front kit for 1964–1966 Mustangs pairs single-adjustable shocks with 10" springs rated 400 lb/in and includes application-specific hardware. It provides 18 settings of combined rebound/compression control, threaded bodies for ride-height adjustment down to 2" lower, and a direct bolt-in installation—no welding required. Powder-coated springs and premium hardware complement QA1 control arms and sway bars for a cohesive setup.
QA1 64-66 Ford Mustang Pro Front Coil-Over System - Single Adj. - 10in x 400lbs/in - Aluminum
