Product Overview
Hardrace Middle Lower 4-Point Brace Q0717 – Mazda MX-5 ND 2015 onwards
The ND MX-5 is light and agile, but as a roadster it has no roof structure to tie the body together. As a result, the underside of the car does a lot of the work in resisting flex. Hardrace’s Q0717 is a four-point cross brace that bolts across the middle of the underfloor. It ties the mounting points together so the shell twists less under cornering loads.
What it does
Reducing body flex lets the suspension do its job more consistently. When the shell moves less, spring and damper settings behave more predictably and the car feels more connected through quick changes of direction. This is noticeable on track days and twisty roads, especially on cars running stiffer coilovers.
- Four-point cross design across the middle of the underfloor
- Bolts to the original mounting points
- Uses the factory fixings, with no drilling
- Black finish
Part of a wider bracing package
Hardrace makes a family of underbody braces for the ND, covering the front, middle and rear of the floor. Q0717 works on its own or alongside the other Hardrace ND braces as part of a fuller chassis-stiffening upgrade. Each brace is sold separately.
Fitment and fitting
This brace is made for the Mazda MX-5 ND, from the 2015 launch onwards. A retailer lists Hardrace’s complete ND underbody package for manual-transmission cars, so check with us if your car is an automatic. Fitting is a simple job on axle stands or a lift. Remove the relevant factory underbody bolts, offer up the brace and refit the bolts, tightening them to Mazda’s specified torques. Check that nothing fouls the exhaust or fuel lines, and recheck the bolts after the first few hundred miles. The brace slightly reduces ground clearance under the middle of the car, so take care over speed bumps and steep driveways if the car is lowered.
Useful links
Browse more suspension parts in our shop. For the manufacturer’s own information, see the Hardrace Q0717 middle lower brace for Mazda MX-5 ND page.
