We used a Setrab filter holder that allows flexibility in how the bracket may be oriented and attached and in how the hoses may be routed.
This is just a filter holder, it doesn't incorporate options for bypassing the filter, but Setrab does make a whole line of stuff that does:
Here's how it looks installed on my car. It's tucked up enough that getting good photos is difficult, but this may help. Notice that the filter is completely above the bottom of the bumper: