Snorkels are an insurance policy for your engine, plain and simple!
Here in Australia we seem to attach snorkels to our 4WD’s more so than any other country in the world besides the UK and for good reason, water crossings, mud and dust inhalation are all part of wheeling in Australia and it would be wise to do everything possible to protect your engine from these! Improved fuel economy is a bi-product of attaching a snorkel to your Jeep and only in some cases does it actually help, but fundamentally the principal of a positively charged air plenum chamber does provide better fuel economy and we do see this in vehicles that commonly sit above an average speed of around 68-70kph.
A “must” for some and a “maybe one day” for others, just think about your engine next time you plough through a deep water crossing thinking “Yeehaaa this is just like the ads on TV!” because it can all come to an abrupt end very quickly when it comes to water crossings! We have worked with snorkel manufacturing companies and beta tested Jeep specific snorkels over the years, and now we've developed our own snorkel for the 2011 - Current WK2 Grand Cherokee.