Ultra Racing Rear Anti Roll Bar - 16mm • AR16-594

Ultra Racing 16mm rear anti-roll bar for Mazda MX-5 MK4 / ND and RF models listed in the compatibility table.

The Ultra Racing AR16-594 is an uprated rear anti-roll bar designed as an aftermarket chassis and handling upgrade for the fourth-generation Mazda MX-5.

The anti-roll bar links the left and right sides of the rear suspension and resists excessive body roll as the vehicle corners. The 16mm solid-steel construction is designed to increase rear roll stiffness and provide a more controlled chassis response during cornering and rapid changes of direction.

Product details:

• Brand: Ultra Racing
• Part number: AR16-594
• Product type: Rear Anti-Roll Bar / Rear Sway Bar / Rear Stabilizer Bar
• Position: Rear suspension
• Bar diameter: 16mm
• Construction: Solid steel
• Installation method: Bolt-on
• Ultra Racing accessory reference: AC082
• Approximate dimensions: 103cm x 20cm x 2cm
• Approximate weight: 2.5kg
• Quantity required per vehicle: 1
• Quantity supplied: 1 rear anti-roll bar kit
• Bushes and brackets: Included in the MazSpec kit specification

Common reasons for fitting:

• Reduce excessive body roll during cornering
• Increase rear suspension roll stiffness
• Improve chassis response during changes of direction
• Provide a more controlled rear-end feel during enthusiastic road or track driving
• Complement upgraded front anti-roll bars, suspension and chassis bracing

Fitment advice:

Ultra Racing manufacturer data confirms AR16-594 for Mazda MX-5 ND applications, including the ND5RC 1.5 manual and 2.0 manual applications. MazSpec application data identifies the kit for all Mazda MX-5 MK4 ND / RF variants. For imported, modified or previously repaired cars, matching the mounting arrangement on the vehicle before installation is recommended.

Other items to consider purchasing:

• Ultra Racing front anti-roll bar
• Ultra Racing front strut brace
• Ultra Racing front lower brace
• Ultra Racing middle lower brace
• Ultra Racing rear lower brace
• Replacement anti-roll-bar drop links where existing joints show wear

Useful tools / consumables:

• Socket and ratchet set
• Torque wrench
• Suitable vehicle lift or axle stands
• Penetrating fluid for corroded suspension fasteners
• Suitable bush lubricant where specified during installation

Difficulty guide: Intermediate DIY / workshop installation. Safe access beneath the rear of the vehicle is required and suspension-related mounting hardware must be correctly refitted.

Why Ultra Racing?

Ultra Racing specialises in aftermarket chassis and handling upgrades. Its anti-roll bars are designed to control unwanted body movement and improve suspension consistency during cornering while retaining a vehicle-specific mounting arrangement.

What's in the box:

• 1 x Ultra Racing AR16-594 16mm rear anti-roll bar
• Anti-roll-bar bushes
• Mounting brackets
• Additional mounting hardware where supplied

Installation notes:

Ultra Racing specifies AR16-594 as a bolt-on installation. The rear of the vehicle will need to be safely raised to access the mounting locations. Remove the existing anti-roll bar as required and install the Ultra Racing bar, bushes and brackets in the correct orientation. Check that the bar, bushes, brackets and drop links are correctly located and free from interference throughout the suspension's normal range of movement. Reassemble and tighten all mounting hardware to the appropriate vehicle or manufacturer specification.