Ultra Racing 2-point rear lower chassis brace for Mazda MX-5 MK1 / NA models listed in the compatibility table.
The Ultra Racing RL2-301 is a rear lower bar / rear tie brace designed as an aftermarket chassis reinforcement upgrade for the first-generation Mazda MX-5 NA.
Mounted beneath the rear of the vehicle, this two-point brace links key lower chassis and suspension mounting areas to help reduce unwanted movement and flex through the rear structure. Reinforcing this area can help the suspension operate more consistently and improve overall chassis response during cornering, braking and acceleration.
Product details:
- Brand: Ultra Racing
- Part number: RL2-301
- Product type: Rear Lower Bar / Rear Tie Brace
- Position: Rear lower chassis
- Brace specification: 2 Point
- Construction: Steel
- Finish: Ultra Racing white
- Mounting: Uses original vehicle nuts / bolts where applicable unless additional hardware is supplied
- Quantity required per vehicle: 1
- Quantity supplied: 1 rear lower brace
Common reasons for fitting:
- Reduce unwanted flex through the rear lower chassis structure
- Reinforce rear suspension and chassis mounting areas
- Help maintain more consistent suspension geometry under load
- Improve rear chassis response during enthusiastic road or track driving
- Complement other Ultra Racing chassis reinforcement components
Fitment advice:
Ultra Racing manufacturer application data confirms RL2-301 for the Mazda MX-5 MK1 / NA platform, and MazSpec lists the brace for all MK1 / NA variants. No engine-specific or transmission-specific exclusion is identified in the available generation-wide application data. 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 front lower brace
- Ultra Racing rear upper brace
- Ultra Racing fender braces
- Ultra Racing anti-roll bars
- Replacement chassis or suspension fasteners where existing hardware shows wear or corrosion
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 access beneath the rear of the vehicle is required.
Why Ultra Racing?
Ultra Racing specialises in aftermarket chassis and handling upgrades. Its vehicle-specific lower braces are designed to reinforce key structural mounting areas and reduce unwanted chassis movement under load.
What's in the box:
- 1 x Ultra Racing RL2-301 2-point rear lower chassis brace
- Additional mounting hardware where supplied with the product
Installation notes:
The vehicle must be safely raised to provide access to the rear lower mounting points. Position the brace correctly and check clearance around the rear suspension, exhaust and surrounding underbody components before final tightening. Reassemble and tighten all mounting hardware to the appropriate vehicle or manufacturer specification.
| Make | Model | Sub Variant | Chassis / Code | Years | Power (PS) | Engine Codes | Fuel | Transmission | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Mazda | MX-5 MK1 / NA | 1.6 | NA6C | 1990-1993 | 115 | B6ZE | Petrol | Manual / Automatic where fitted | 2-point rear lower / rear tie chassis brace. |
| Mazda | MX-5 MK1 / NA | 1.6 | NA6C | 1994-1998 | 90 | B6ZE | Petrol | Manual | 2-point rear lower / rear tie chassis brace. |
| Mazda | MX-5 MK1 / NA | 1.8 | NA8C | 1994-1998 | 130 | BP-ZE | Petrol | Manual / Automatic where fitted | 2-point rear lower / rear tie chassis brace. |
| Reference Type | Reference Number | Notes |
|---|---|---|
| Mazda OE | N/A | No direct Mazda OE reference - aftermarket chassis reinforcement part |