Superduty to Econoline Spring Perch Kit

Description: Our standard 4x4 E-series conversion setup utilizes your original van coil springs. You can read up on our reason for pursuing the coil spring version vs the leaf spring version on our E-series page, look for the Coil V Leaf Tab. Bolting up a Superduty axle in place of your existing front end only adds about 200 lbs per front corner. There are widely varying spring rates across both vans and trucks. For this reason, we recommend keeping the spring rate you have which will ensure the highest ride quality. There are modes to run Superduty or other aftermarket springs, we have some support, but the perch method is our preferred design and consistently performs.  Lift & Tire Size Consideration 4" lift + 31.5" tires - Lowest lift recommended for solid axle E-series vans4" lift + 33" tires - Daily driver grade ride height, very much a 4x4, typical Quigley stature5" lift + 33" tire - Typical Timberline van, excellent balance of clearance/suspension travel5/6" lift + 35" tires