Chassis Components› Chassis and Frame Components

Ultra Racing

Rear Lower Side Bars

$116.00

SKU: UR-RS4-1817P

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Ultra Racing UR-RS4-1817P is a set of two rear lower side bars designed to enhance chassis rigidity. These bars help mitigate chassis flex and deformation caused by weight transfer during cornering, braking, and acceleration. By reinforcing the chassis, they aim to improve tire grip and reduce negative handling traits such as understeer and oversteer.
Show original supplier description
The Ultra Racing UR-RS4-1817P is a set of two rear lower side bars engineered to significantly increase the rigidity of your vehicle's chassis. The car's chassis is subjected to considerable stress from driving dynamics like rapid cornering, hard braking, and aggressive acceleration. This stress, particularly during cornering where one side can experience up to three times the force of the other, can lead to substantial chassis flex, body deformation, and twisting. Such distortions can compromise tire grip and result in undesirable handling characteristics like understeer and oversteer. By adding structural support to the rear lower section of the chassis, they help to minimize unwanted flex and twisting. This results in a more stable and predictable platform, allowing your tires to maintain better contact with the road and enhancing overall handling performance. Manufactured with durability in mind, these bars are typically constructed from high-strength steel, ensuring they can withstand the rigors of performance driving. The product is a set of two bars and comes in a white finish. The product is specifically designed for the Ford Focus 1.8 MK2 models produced between 2005 and 2010.

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

BrandUltra Racing
Part NumberUR-RS4-1817P
CategoryChassis Components
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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.

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