K&N filter with Evolution
New to the site and I have ordered an evolution a few months ago and love it. I am in need of a new air filter and am thinking of going with the K&N drop in filter. I've heard of people running lean with the CAI and custom tunes took care of that. My question is do I need custom tunes if I am only running the drop in filter? Only other modification I have is flowmaster SI/DO exhaust and my truch is a 2004 f150. I will probably upgrade to custom tunes sometime in the future but right now I don't have the need to.
Thanks.
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