UMI Performance Stage 5 Handling Kits ABF409-1-B

UMI's top-tier Stage 5 kit, ABF409-1-B, uses double adjustable twin-tube shocks front and rear instead of the monotube or RideTech shocks used elsewhere in this lineup, running on Spherical Bearing/Delrin bushings rather than polyurethane. UMI builds it for classic A-Body platforms spanning several GM divisions from the 1960s and '70s era. What's in the kit A solid 1.25" front sway bar is matched to a solid, adjustable 1.00" rear sway bar, and both the control arms and trailing arms are tubular steel finished in black. A chassis stiffener is included; spindles and brake parts are not. UMI's notes list a 450 lbs./in. front spring rate for this kit. What to check before buying Because this is UMI's top tier in the handling-kit range, expect a more involved install than the Stage 2 kits, with double adjustable shocks that reward some time spent tuning compression and rebound. Confirm your specific A-Body model and year against UMI's fitment chart before ordering. Common questions Which cars is this built for? Classic A-Body models from Pontiac, Oldsmobile, Chevrolet, Buick, and GMC built in the 1960s and '70s. Is the rear sway bar adjustable? Yes, the solid 1.00" rear bar is adjustable. Specifications Feature Details Brand UMI Performance Manufacturer Part # ABF409-1-B Product Type Suspension Handling Package Front Coil Springs Included? Yes Rear Coil Springs Included? Yes Rear Leaf Springs Included? No Front Shocks Included? Yes (Double Adjustable Twin-Tube) Rear Shocks Included? Yes (Double Adjustable Twin-Tube) Front Sway Bar Included? Yes (1.25” Solid) Rear Sway Bar Included? Yes (1.00” Solid, Adjustable) Upper Control Arms Included? Yes (Tubular Steel) Lower Control Arms Included? Yes (Tubular Steel) Trailing Arms Included? Yes (Upper & Lower) Control Arm Material Steel Control Arm Color Black Bushing Material Spherical Bearing/Delrin® Chassis Stiffener Included? Yes Mounting Hardware Included? Yes Spindles Included? No Brake Components Included? No Quantity Sold as a kit