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Suspension and Components› Rear Suspension Components

Maximum Motorsports

Rear Upper Control Arm Bushings

Name: Rear Upper Control Arm Bushings
Brand: Maximum Motorsports
SKU: E4SZ-5A

$55.97

SKU: E4SZ-5A

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$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Maximum Motorsports E4SZ-5A is a pair of rear upper control arm bushings for Mustangs with 7.5" and 8.8" solid rear axles. The product fits 1979 through 2004 Mustang models.

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The Maximum Motorsports E4SZ-5A is a pair of differential side (aft) upper control arm bushings for 1979-2004 Ford Mustangs equipped with 7.5" and 8.8" solid rear axles. These bushings are crucial for replacing worn components when installing new rear upper control arms, ensuring proper suspension articulation. The chassis side (forward) bushings are integral to the control arm itself and are not part of this product. It is recommended to use rubber bushings for this application, as urethane bushings can cause binding and lead to chassis damage due to the necessary twisting and pivoting motion of the upper control arms during axle travel. Maximum Motorsports offers a specialized bushing removal and installation tool (MMT-1) designed to make the replacement process significantly easier. The manufacturer notes that these bushings are a common wear item, especially for vehicles used in performance driving or track applications, and replacement is recommended for Mustangs from 1979-2004, particularly if they have not yet been converted to a torque arm setup, which eliminates the upper arms entirely. Both Ford and trusted vendors supply these bushings, and Maximum Motorsports has determined that they are manufactured by the same source and are of equal quality. Due to stock rotation, it is not possible to specify the exact source of the bushings when purchased.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

Brand	Maximum Motorsports
Part Number	E4SZ-5A
Category	Suspension and Components

Videos

Maximum Motorsports Rear Control Arm Installation #FairmontProject

How To Install a Maximum Motorsports Torque Arm For Better Traction!

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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