Here is a SA2000 helmet that is out of spec for racing but is a nice helmet for casual use.
Size is 7 1/2"
Radio harness is installed and has Hans mounts
Geartronics partner program
We have been using Geartronics in race cars for the last 6 years and now have experience with their Motec M1 series packages specifically for the motorcycle engines used in some race cars such as our F1000.
Cambox V4 Pro - Visorcam
We only support and sponsor products we use and believe in. This is one example, the new V4 pro visorcam is fantastic at 4K 60FPS. Buy using the discount code NMS05 and save 5%
Managing heat is key to strong performance and reliability. ATP builds custom heat shields using space age Inconel metals. We highly recommend ATP for your race car. Use NMS21 and save 5% when placing an order.