is this standard or an add on as I have not seen on any other cars?
They are an add on, MX5Parts are usually favourite to buy them. I assume you are talking about the wing indicators, mine are actual chrome (metal) trim rings, you can buy chrome rimmed (plastic) light unit too. Standard would be black rimmed.
Mine’s Mk3 but they are virtually the only part that fit all models of MX-5
Hi , these are after market add on's , you just buy the outer rim and they clip over the original black plastic outer rim . Cheers for now . Andrew