Hotchkis Sport Suspension 2430 1964 - 1966 Ford Mustang Coupe Fastback and Convertible Sport Leaf Springs with 1.5 in. Drop. Lower your 1964 - 1966 Ford Mustang Coupe Fastback and Convertible and reduce roll and increase handling with our 1.5 in. lowered Sport Leaf Springs. Our Sport leafs represent the latest technology in performance spring. Our springs utilize a heavy duty multi-leaf design eliminating sag and reducing axle wrap. Hotchkis leaf's feature high durometer polyurethane rear bushings and rubber front bushings offering both performance and comfort. These leaf springs are also equipped with anti-squeak tip inserts that offer quiet operation. Included are heavy duty shackles and u-bolts. Features: Lowers vehicle 1.5 in. from original ride height. Higher Performance 180 lbs/in Spring Rate Direct Bolt-On Installation Durable Black Coat Finish. Specifications: Fender-Edge to Center of Rear Wheel (at Lowered Ride Height): Coupe/Convertible 12.5 Fastback 12.5 Spring Rate: 180 lbs/in Drop: 1.5 or 38mm. Take your 1964 - 1966 Mustang to the next level of performance for autocross and track days. Hotchkis Rear Sport Leaf Springs are one of the fastest easiest and most dramatic modifications you can make to the Mustang offering a sleek lowered stance dramatically improved handling and superior driver control thanks to a lower center of gravity. Our engineers poured over computer modeling and track testing data to create the ultimate Mustang leaf spring that improves handling while offering a sporty yet comfortable ride. Designed and manufactured by Hotchkis Sport Suspension specifically for the 1964 - 1966 Mustang our street autocross and track event ready Sport Leaf Springs were developed as part of a balanced system giving the Mustang an aggressive stance and balanced handling especially when combined with Hotchkis Front Sport Coil Springs Sport Sway Bars and 1.5 SPS Shocks. **Note** For use on cars with axle tubes of 2.75" in dia.