907 votes
For the *engine* air filter, I ordered a K&N WASHABLE/REUSABLE AIR FILTER because I liked the idea of an \"Eco-Friendly\" alternative that can be washed and used for the life of the car. And it got excellent ratings online. So I was disappointed to discover this \"Eco-Friendly\" alternative comes with a Prop 65 warning
Air filter, I'd stay far far away from K&N, more flow = more dirt getting in and oil could mess up the MAF. Also, you are not going to gain anything.
K&N filters are a scam. Anyone who installs them is a sucker. Anyone who recommends them is a rube who doesn't understand how their vehicle works.
If you care about your car, DO NOT install one of this shitty products.
THEY DO NOT MAKE MORE PERFORMANCE ON A STOCK OR NEAR-STOCK VEHICLE.
THEY ALSO DO NOT FILTER WORTH A CRAP.
YOU WILL NOT HELP YOUR ENGINE AND YOU WILL CAUSE EXCESSIVE WEAR.
Works like a charm I love it and highly recommend!
I installed K&N. Great replacement for the stock filter. Noticed a bit more induction whistle and the car definitely feels like it breathes better.
Very nice setup! I just installed the drop in K&N but too soon to see results. Although the placebo effect sure is nice at WOT but probably not as much as your CAI.
My intake parts showed up yesterday and today. Here they are installed: Under normal driving conditions you’d never notice it’s there. Not until you go WOT and get up above 3-3500rpm does the lovely VR gurgle kick in. Can’t tell a difference in power from the butt dyno but I also wasn’t going WOT on stock intake right before I swapped it. I may get skippy and run some data logs and see what the MAF is reading. I will also report back after some normal driving what the fuel consumption change is, if any.
I put in a K&N filter and the improvement is noticable. I posted my milage on a filter post. The 300 mile trip includes a mountain pass and other steep elevation changes. We normally get 21-23 mpg, but we got 25.6 going, 24.2 returning at 65 mph average speed each way. I made the trip again yesterday and got 26.1 mpg going, average speed 69 mph. My last tank of gas for normal driving around town for 350 miles with a mixture of city and highway driving had a 23.0 mpg average. That is 1.5 mpg better than normal. I attribute this to improved airflow.
I'm pleased with my K&N as well. It was given to me by my stepson, who works at an auto parts store. Otherwise, I would have maybe gone for the dry filter. I really like the mileage improvement this has given me as well as the noticeable better response.
I recently replaced my filter with a K&N. I was hoping for a little more felt power and better fuel economy. I've had my 2010 Prius IV for 4 years and have put over 60k miles on it so I'm pretty "in tune" with it. I haven't noticed any difference in either area.
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