Not Ranked
Cranky,
I run the 15" length, 8" width, and 3" height K&N filter on my 351 and I really noticed a difference in it and the one for show that is 21" long and has the Cobra top. But I don't see much difference in the K&N and any other good filter that size that I have tried. That size just happens to fit under my hood well with plenty of clearance.
Ron
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