Spacer Kit: Part #1058 spacer kit designed to fix the oversized hole problem with the factory rear upper control arm mount. Where the rear upper control arm mounts to the chassis Ford uses a 14mm bolt and a 14mm hole in the upper control arm, however the hole in the chassis mount is 16mm. This stepped spacer set is designed to take up this slop and eliminate noise and clunks from the upper control arm area. This is done by reducing the hole size from 16mm to 14mm which does not allow the bolt to shift during acceleration and braking. The spacer kit slides into the upper mount and steps the hole size down to the correct diameter of 14mm, this allows for a tighter fit and no more clunking! Note: This kit is designed to work with the OEM upper control arm mount. It will work only on aftermarket control arm mounts that use a 16mm hole. Most aftermarket companies supply there new upper mounts with 14mm holes.. This new upper rear control arm replaces the factory stamped control arm reducing wheel hop and increasing traction. The S197 Mustang chassis uses a 3-link rear suspension system with a panhard bar to control the rear end under the vehicle. Under hard loads the factory pieces tend to flex and rubber bushings deflect leading to poor traction and erratic handling. Replacing the factory pieces with stronger well designed items eliminates this flex allowing for better control of the vehicle and improved traction during launches.. Replace your factory upper control arm with this new arm for improved traction and handling. Featuring a Chrome Moly spherical rod end and easy adjustments, this arm is a versatile and durable upgrade for your vehicle.. Mounting bracket built using 0.250” thick steel and CNC machined for precision tolerances. 4140 Chrome Moly heat treated left and right hand adjuster for maximum strength. QA1 Chrome Moly spherical rod end with Teflon®/Kevlar® self lubricating race. Upgraded rear control arm boosts traction, stability, and launch control.. 4140 Chrome Moly tube threaded tube adaptor to insure thread durability. UMI Performance 05-10 Ford Mustang Adjustable Upper Control Arm. Brilliant durable powder coat finish, available Black or Red.. UMI- Adjustable Upper Control Arm. MIG and TIG welded construction. Reuses factory hardware. 100% bolt-on item!. Upper Control Arm

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