I was looking at crap I don't really need ystrdy on Amazon.
I noticed this product & thought it worth sharing.
I run extended breathers up to cowl , but have considered the ARB diff breather thing before ; it's just kinda overpriced ,in my opinion.
Now, it appears there is a knockoff , Chinese ,same solution minus the brand , available for a slightly reasonable price, compared to the ARB.
no-name axle differential breather kit
https://www.amazon.com/dp/B07V3C77HY/ref=cm_sw_r_sms_apa_i_zVDFEbH6QJ9WB ARBs