Hotchkis Sport Suspension 80040-1 1964 - 1966 Mustang TVS (Total Vehicle System) from Hotchkis Sport Suspension. The Hotchkis TVS Kit is an all-inclusive kit that has been designed and tested as a system for your 1964 - 1966 Ford Mustang Coupe Fastback or Convertible. No need to mix and match components since the kit includes high performance coil springs 700 lbs/in Front with 0.5 in. Lower Ride Height 180 lbs/in Rear Leaf Springs with 1.5 in. Lower Ride Height lightweight 32mm (1.25 in.) 4130 Tubular Steel Front Sway Bar and Lightweight 22mm (0.875 in.) DOM Tubular Steel 3-Way Adjustable Rear Sway that allow for suspension tuning for optimum track or street performance. This Direct Bolt-On Installation kit requires no vehicle modifications and comes with Premium Mounting Hardware Including: Steel U-Bolts Laser Cut Axle Mounts & Frame Rail Mounts Polyurethane Bushings and Grade 8 Bolts TIG Welded Steel Dogbone End Links with Polyurethane Bushings and Durable Gloss Black Powder Coat Finish. The Hotchkis Sport Suspension Stage TVS system for the 1964 - 1966 Mustang offers a sleek lowered stance dramatically improved handling and superior driver control by reducing body roll improving steering response while giving you a sleek lowered stance with sporty yet comfortable ride especially when combined with the Hotchkis 1.5 SPS Shocks.