Ultra Racing Front Lower Brace - 4 Point • LA4-3718

Ultra Racing 4-point front lower chassis brace for Mazda MX-5 MK4 / ND and RF models listed in the compatibility table.

The Ultra Racing LA4-3718 is a front lower bar / front member brace designed as an aftermarket chassis reinforcement upgrade for the fourth-generation Mazda MX-5.

Mounted beneath the front of the vehicle, this four-point brace links key lower chassis and suspension mounting areas to help reduce unwanted chassis flex. Reinforcing these mounting points can help the front suspension work more consistently under load and improve overall steering and chassis response.

Product details:

• Brand: Ultra Racing
• Part number: LA4-3718
• Product type: Front Lower Bar / Front Member Brace
• Position: Front lower chassis
• Brace specification: 4 Point
• Construction: One-piece welded steel
• Finish: Ultra Racing white powder coat
• Installation method: Bolt-on using OEM mounting points
• Ultra Racing accessory reference: BC052
• Approximate dimensions: 62cm x 45cm x 3cm
• Approximate weight: 0.8kg
• Quantity required per vehicle: 1
• Quantity supplied: 1 front lower brace

Common reasons for fitting:

• Reduce unwanted flex through the front lower chassis structure
• Reinforce key front suspension and chassis mounting areas
• Help the front suspension operate more consistently under cornering loads
• Improve steering and chassis response during enthusiastic road or track driving
• Complement front upper, centre and rear chassis bracing upgrades

Fitment advice:

Manufacturer application data confirms LA4-3718 for Mazda MX-5 ND applications. Ultra Racing Malaysia specifically lists the 2.0-litre 2WD manual model, while Ultra Racing Japan separately confirms the ND5RC 1.5-litre manual model. MazSpec application data also identifies LA4-3718 for the MX-5 MK4 ND / RF platform. 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 strut brace
• Ultra Racing middle lower / member brace
• Ultra Racing rear lower / member brace
• Ultra Racing anti-roll bars
• Replacement chassis or suspension fasteners where existing hardware shows corrosion or damage

Useful tools / consumables:

• Socket and ratchet set
• Torque wrench
• Suitable vehicle lift or axle stands
• Penetrating fluid where existing underbody fasteners are corroded

Difficulty guide: Intermediate DIY / workshop installation. Safe underbody access is required to reach the front lower mounting points.

Why Ultra Racing?

Ultra Racing specialises in aftermarket chassis and handling upgrades. Its chassis braces use rigid one-piece welded construction designed to reinforce key areas of the vehicle structure and reduce unwanted movement between mounting points.

What's in the box:

• 1 x Ultra Racing LA4-3718 front lower chassis brace
• Required mounting hardware as supplied with the product

Installation notes:

Ultra Racing specifies LA4-3718 as a bolt-on installation. The vehicle will need to be safely raised to provide access to the front lower mounting locations. Position the brace correctly and check clearance around surrounding suspension, steering, engine and underbody components before final tightening. Reassemble and tighten all mounting hardware to the appropriate vehicle or manufacturer specification.