Can confirm that the early 2011-2014 Mustang 3.7 V6 air filter is the one for similar engined Roadsters.

The equivalent oiled cotton K & N panel filter version is part number 33-2431 and available from a couple of eBay sources including one linked above. It drops straight in to air box.

This is the sales hype on back of box.



Doubt if I'll notice the improvement but there will be some based on experience selling K & N filter conversion kits for Moto Guzzi's. Here we would supply in the kit size 5 richer main jets for carbs to compensate for increased air flow. In this case the ECU will compensate.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone