Hi There Terry. Welcome to the world of Roadracers. If you're going to build that McLaren M8D and want it to be correct go to Indycals and get the Decal sheet for the M8D "Dan Gurney, Peter Gethin". That hoop on the Rollbar was for Dans added height over Bruce McLaren that sadly died while testing the M8D. Peter on the other hand was shorter than Dan yet they retained the hoop.