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Suspension and Components› Sway Bars and Components

Supermiata

4140 CroMoly Ball Joint Kit

Name: 4140 CroMoly Ball Joint Kit
Brand: Supermiata
SKU: 20159970

$213.00

SKU: 20159970

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The 5X Racing 14mm Adjustable Rear Sway Bar is a performance upgrade for 1990-2005 Mazda Miata models. This sway bar features a 3-way adjustability system and a 14mm thickness. It includes 80A durometer urethane bushings for a balance of compliance, performance, and durability.

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The Supermiata Front End Service Kit (FESK) is engineered with forged 4140 CroMoly steel, providing a stronger alternative to cast OEM components for demanding racing applications. The kit includes serviceable UBJs, LBJs (available in standard or optional extended versions that increase negative maximum camber by 2°), and outer tie rod ends. Optional inner tie rod ends for power steering are also available for 90-97 and 99-05 MX5 Miata models. The components are heat-treated, ISO TS16949 certified, and feature a Zerk fitting for lubrication. Supermiata offers a 5-year warranty on these parts, excluding the rubber boot. This service kit is specifically designed for 89-05 Miata models and is sold as a set for both sides of the vehicle.

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	Supermiata
Part Number	20159970
Category	Suspension and Components

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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

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