Leaf Spring Rear Shackle Kit: Mono 67-69 Camaro Firebird w/hardware USA MadeUSA made Energy Suspension Polyurethane kit as shown.. available in RED or Black. For 1967 69 Camaro & Firebird models with MONO (Single) leaf rear springs with the support hardware as shown. You may not need the support hardware.. or might just want to renew it. Includes REAR SHACKLE KIT ONLY bushings and hardware. Reduces wheel hop in acceleration, prevents shudder under braking and delivers greater handling control. Great for vehicles with high