Trackday - Helmet recommendations unusually large head

[Onager76]

Hi,
I am a new member and apologize if this is a rookie question or posted in the wrong spot.

I need an auto racing helmet for an upcoming track day, but my I have a big head. Not an apples to apples comparison, but my current motorcycles helmet is a 4xl. Does anyone have a recommendation for an auto helmet in 3xl/4xl size?

I have found two Bell helmets Bell (Racer Series) M.8 Auto Racing Helmet SA2015 and Bell - Sport Mag SA2015 Open Face Racing Helmet that go up to 4x. Would either of those be sufficient for trackdays at the ring?

Thank you

[Trabi601]

Just use your bike helmet, that's what I do.

[E-bmw]

In fact it is what the VAST majority do.

The car racing rather than bike racing helmets are Nomex lined, this is only of use to you if the rest of you is going to be Nomex covered & you end up on fire.

[Onager76]

Thank you for the replies. Sounds like I'll stick with the mc helmet for now. It will save some $ and i wont have to try to find something that fits

[Trumper112]

I have a large head too! I went to the small motorsport outlet in Sydenham (South London) who were extremely helpful and kept trying on different types until it worked. V happy with it.