Chassis Components› Chassis and Frame Components

Ultra Racing

Rear Lower Bar

$105.99

SKU: UR-RS4-3203P

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Ultra Racing Rear Lower Bar is a chassis component designed to enhance vehicle rigidity. It is constructed from high-quality steel plates, with brackets measuring 4mm to 5mm thick and tubes ranging from 1.2mm to 1.6mm in thickness. This construction ensures strength and consistent geometry while also being designed to crumple safely during an impact.
Show original supplier description
The Ultra Racing Rear Lower Bar (UR-RS4-3203P) is engineered to combat chassis flex, which is exacerbated by the weight transfer during driving maneuvers like cornering, braking, and acceleration. Excessive chassis flex can lead to negative handling characteristics such as understeer and oversteer, and can even cause tire grip loss. This rear lower bar aims to neutralize these forces, improving vehicle stability and handling response. The hollow steel tubes and oval tubes used in the bar range from 1.2mm to 1.6mm in thickness. These specifications are chosen to provide optimal rigidity and strength, ensuring consistent geometry under stress. All raw materials undergo rigorous testing to meet performance standards. Ultra Racing's commitment to performance is backed by their Motorsport Division, which actively participates in track racing, autocross, and drifting competitions. This involvement allows them to enhance their products based on real-world feedback from motorsport events. The brand is a proud chassis tuning partner for several racing teams, demonstrating its presence and capabilities in competitive environments.

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-RS4-3203P
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.

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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