I have the old model AEV on mine. I have never had an issue with air starvation as far as I can tell. The new model flows better & I
think it will fit the older engine as well.
I don't use the ram head either, (lost it on the way home along the freeway years ago, or someone stole it in the carpark at Westfield & I didn't notice when I got back to the car...). I replaced it with a Donadson Topspin prefilter & the normal air filter lasts for ages now!
And secured it much better this time!