[QUOTE=KMK454;2609664]Seriously?
[QUOTE]
Yes! Here is a snap shot of a 4.5 K&N filter on my ZZ4.
I used it on the previous stock 305. I learned by experience the engine would run hot with a 3" filter. Especially at highway speeds. The 4.5" was awsome to WOT. People wondered why the 305 had at least some pep to it. Tuning and having enough air to feed the engine are imporant.