I was looking more for an open air cone filter for more sound as well
I didn't measure exactly but I would think the X1 air filter would fit in the X2 box and according to the description on the amazon link it is. Everything is VERY similar.. in fact, if there was an adapter available to convert from the oval MAF opening to the slot style it would work. I'm investigating options, but most are starting to get pricey for me to try for fun.. we'll see.