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Chassis Components› Chassis and Frame Components

Ultra Racing

4-Point Rear Lower Bar

Name: 4-Point Rear Lower Bar
Brand: Ultra Racing
SKU: URTW-RL4-3710

$143.00

SKU: URTW-RL4-3710

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Ultra Racing 4-Point Rear Lower Bar is a chassis component designed to improve vehicle stability. It addresses chassis flex and deformation that occurs during driving maneuvers like fast cornering, hard braking, or hard acceleration. By reinforcing the chassis, this bar helps mitigate negative handling traits such as understeering and oversteering, ultimately leading to better grip and more predictable handling.

Show original supplier description

The Ultra Racing 4-Point Rear Lower Bar is engineered to significantly enhance the rigidity and performance of your Mazda MX-5 (NB) 1.8 2WD models from 1998-2005. The chassis of a vehicle is subjected to considerable stress due to weight transfer during aggressive driving. This stress can cause the chassis to flex, deform, and twist, leading to a loss of tire grip and undesirable handling characteristics like understeer and oversteer. The 4-point design effectively distributes forces and neutralizes the shock of impact transferred to the chassis. This extensive testing ensures that their chassis bracing provides competition-level performance suitable for everyday use. By reducing chassis flex and improving the connection between suspension mounting points, this bar enhances steering feedback, road handling, and can contribute to reducing uneven tire wear. This specific bar is designed as a direct fit for the Mazda MX-5 NB 1.8 2WD model years 1998-2005. Installation is straightforward and does not require modifications. The addition of this rear lower bar not only improves handling dynamics but also adds an aesthetic touch to the vehicle's underside.

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	Ultra Racing
Part Number	URTW-RL4-3710
Category	Chassis 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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