Quote Originally Posted by Ldub View Post
You "should" be able to scribe the fender contour unto the snorkel base with a silver sharpie marker, then cut/sand to that line to make it fit perfectly.

"should" meaning, that I don't know all the particulars of it's construction with regard to internal mounting flanges etc.
That's pretty much what I did with a heat gun by softening the plastic & shaping the contour to match our fender. Like you said, you can also cut the contour but then will have another hole on the base that will need to be filled. Even after shaping the base to our fender, the top & bottom edges still have a gap that needs to be filled by something. That's where the weather strip works nicely