The airflow is improper, K&N's have near Zero success rate on most 93 SS's. There's a dozen or more threads, even K&N admits it. Here is a cut and paste from an old thread:
....over a year ago I contacted K&N and posted the response, it seems even there application guide, which no-one ever reads it seems, states that the 57i is not compatible with all 93's....I'll do a quick look to see if I can find it, but just a quick one....
Here, this was quite a hot topic for a while.
From Nick Peres at K&N:
"This particular intake kit was found not to properly fit/work on the models that are not listed in our application guide. Hope this helps,
Tech support"