Here is a thread that covers some of the K&N options.
"KNN E-2570 is 8.1 inches X 2 inch. The KNN E-1015 is 8.5 inches X 2.5 inch."
K&N part number for Stellings
Here is another thread on the subject:
Pent-Roof Valve Covers and which air cleaner?
I use the 2570, the 1015 was too tall to clear for me. One nice benefit to the 2570 is you can slide the wire mesh from the S&H over this element and it maintains most of the original look (if you care about that).
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