I bought two K&N filters so I don’t have to wait for it to dry I believe the part# is VF2033 I don’t remember what I paid for the them at the time. $40ish bucks but I don’t have to buy another one for a long time
I put one in probably 7k miles ago, no issues thus far. I didn't do a whole cold air intake, just the box filter replacement.
I put one in, about 4k miles ago. Just needed a new filter figured why not. Helps with some of the hesitation the cars have, no issues.
A great aftermarket filter like a K an N reusable filter can be great especially if you plan on keeping the car forever. You buy a cleaning and oiling kit. The other option is to buy a good quality aftermarket disposable one.
I bought the K&N replacement filter. I also removed this extra mesh that’s almost like it’s plastic welded on the engine side of your intake. Either way, butt dyno said I gained at least 1hp. And there is a little more intake noise which I like.
I use one in all my vehicles. My partners Subaru is at 130k miles and my Highlander was at 197k miles before i traded it in. Both had no issues and after that many miles in a dusty environment, I certainly saved $$$ by not buying disposable ones.
I've run them on basically everything I've owned for the past 15 years. People hate them because they claim the oil fouls the MAF and that they let in more junk. I've never had a MAF fail and I've had two F-150s go over 200,000 miles on them with their original motors. My current F-150 has 239,000 and counting, no problems with it. Why buy them? I do it because they're re-usable. I think the K&N for my current F-150 was $45 when I got it, and the Motorcraft filters are $10-12. So over time it will save money, kind of, if you don't mind the work. Would I do it again? Nah. I'm done with them because it *is* kind of a pain in the butt to clean and oil them all the time. On two vehicles they added a bit of pleasing intake noise but again, eh. No big deal. I wouldn't waste the money. Just get the manufacturer filter and swap it out every year.
There was a "performance" K&N filter and lots of detritus in the bottom of the air box I scrubbed down the box, and it is looking fresh. Except for the super greasy valve covers and rest of the engine bay. Oh, and I'm getting rid of the K&N filter--never been a fan.
Thanks for posting this question, mine came with the K&N from the previous owner and the airbox baffles removed. I put them back in along with a new paper filter early on. When that soiled I remembered the K&N was hanging out in a box. Bought a cleaning kit and did my best to follow the directions, removed the air box baffles again (I had at the time recently read about how it may increase flow and improve the sound of the intake), and once clean, popped the 'wet' K&N in.
Fast forward 6k miles and I start having a bit of a rough idle even after all new upgraded ignition components, starter, battery, premixing, and cat delete and so I decided to check the MAF (which I had cleaned back when replacing the SSV solenoid) - fucking filthy! Oil all up in the throttle body. That shit let a mess in there, man! Cleaned the MAF and back to paper we go. Car is healthier than it has been since I have owned it. The intake on the 8 was designed very thoughtfully and very well to run stock components - paper filter and baffles included. I regret messing with it based on old ass posts on RX8club from before the info others have posted here was well understood.
The only things the k&n filter will do is add dust to your engine, warm air for your engine, intake noise to your ears and annoying raspy sounds when you WOT.
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