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I have used a non K&N system but it does have a true K&N filter. After reading about these type systems letting more dirt into the engine plus it now takes in the hot air from the engine compartment, I removed mine. Also, I removed it to have some warranty work done and never put it back on. Volant makes a great system that acyually pulls cold air in but it is somewhat expensive. If you want to buy my system, let me know. Only on the truck for 5 months.
This is what I have on my '99 4.6L, it allows you to use the stock filter "box" but replaces the intake tube. I love mine, it has a nice growl when you punch it. I also have a K&N filter installed as well.
I have used a non K&N system but it does have a true K&N filter. After reading about these type systems letting more dirt into the engine plus it now takes in the hot air from the engine compartment, I removed mine..... and never put it back on. If you want to buy my system, let me know.
That's a hell of a sales pitch!
Also, let's keep the boards technical not for-sale or offers to sell/trade on the boards, please. Thanks.