Exhaust Fumes Rag Top

Morning all. Hope everyone is enjoying the sunshine and getting out in their financial black holes .

Is it normal to get exhaust fumes in the cab when driving with the rag top rear flap open? Definitely seems to be an issue with mine. Cannot really say the same when the rear flap fully closed.

I’ve recently had a new SS exhaust and manifold fitted so will check for obvious leaks, but definitely seems to be exacerbated when running with the rag top open.

Thanks as ever for any insight

Pretty much so, had to drive my hard top with no rear door for a while as it was under repair. I did put a spare tail gate on but fumes came in. Best one can do is have the bulkhead flaps open to have a through flow of air.
Other rag toppers may have different solutions.

If you keep the windows closed the fumes roll back in.
We either drive with door tops off or sides rolled up
Don’t have the luxury of flaps on the S1 to open