Overview

UMI Performance Weight Jack Systems

UMI Performance weight jack systems replace your factory springs with tough, adjustable weight jack buckets and custom wound ultra-premium performance springs. They provide a lowered stance for your vehicle and different ride styles (crisp, firm, etc.), depending on application. The included Acme bolt and industry-exclusive thrust bearing system allows for ultra-smooth ride height adjustments at the track. Bending potential is reduced by the thrust bearing system's ability to spread the load over a large surface area. UMI weight jack systems give you the ride height adjustability of a coilover, while still allowing maximum tire clearance around your strut. They're available in either a gloss black or red powdercoat finish. Order the kit designed to fit your specific model.

Features, items, and specs:

* Strong CNC laser-cut 1/4 in. steel provides bend-resistant strength
* Adjustment only requires a ratchet and 3/4 in. socket
* 0 to 2 1/2 in. lowering
* Anti-rotation tab
* Allows independent corner weight tuning
* Maintains factory clearance around strut for maximum tire/wheel width
* Front kits pair nicely with UMI Afco, Viking, or Koni struts (also works with factory strut)
* Front kits fit UMI and factory K-member (may not work on other brands)
* Rear kits work with Strange Engineering and factory rear-end housings only (minor grinding required on left axle pad)

Applications

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