If using these with stock length studs, you need to be double careful to properly torque lugs and then re-check that torque often, particularly for those racing as studs will get hot in racing and lugs will get loose and need application of the torque wrench once hot.
MIATA MX5-NC 2006-2015
MIATA MX5-NC 2006-2015
MIATA MX5-NC 2006-2015