ULTRA RACING 4-point mid lower brace for Mazda MX5 NC 06+

The mid lower brace mounts under the floor in the middle of the car and ties the left and right sides of the floor together, the area that twists most under weight transfer in a corner.

Fast cornering, hard braking and hard acceleration move the weight of the car around and twist the body – in a corner one side can carry up to three times the force of the other. A twisting body changes the suspension geometry, the tyres lose grip and the car starts to understeer or oversteer. ULTRA RACING braces stiffen the body exactly where it twists most.

• Vehicle: Mazda MX5 NC 06+
• Mounting points: 4
• Material: steel – tubes with 1.2–1.6 mm wall, brackets from 4–5 mm steel plate

Before series production the manufacturer tests every design on three jigs – compression, torsion and flex – and then on track. The braces are designed to hold the geometry in road and track use but to crumple in an impact.