I run the K&N and a Snorkel on lil Suzy. I figure the scoop on the snorkel gives a little ram air effect at highway speeds and I can ford deep water without worry. The K&N is a good choice, just don't clean it to often. It actually filters better once it has some dirt on it. I was listening to a rep from K&N on a local hot rod radio show a few weeks ago and he was saying that cleaning the filter too often was the biggest mistake users make.
You should be fine with the standard filter routing. Ram induction is somewhat over rated. It will not actually pressurize the air at the injector unless you are going insanely fast. Even then the compression is negligible. The best you can expect is to make the air available to the injection when it wants it, so engine vacuum doesn't have to suck it through the filter. Testing for air restriction is quite easy. with the engine running loosen the rubber hose between the injector and the filter. Remove the hose and if the rpms increase there is restriction. using the idle screw on the injector Rev the engine to a steady 2,500 to 3,000 and repeat the test. This will give you a good idea of how much restriction there is in the system. If you find restriction you can do the same test at the filter. fix the filter to the lid with double sided tape or rolled duct tape, then install and remove the lid and listen for rpm changes.
