Reviewed By Robert W (Melville, NY) Reviewed for a 2010 Toyota 4Runner —10/2/2015 3:18 PM
The air filter seems to make the SUV run smoother and easier acceleration. Also notices an improvement in gas mileage.
Reviewed By Alfred C (Rego Park, NY) Reviewed for a 2010 Toyota 4Runner —3/26/2011 5:16 AM
Not sure if there is any HP gains but it does sound a little better and the throttle seems smoother/quicker. Although, I haven't done actually MPG measurements the computer average say about 1 mpg gain. I used a KN oiled on my last vehicle but wanted to try something new. It's a good choice if you want to stay away from Oiled air filters and the disposable stock paper.
Reviewed By Paul B (Eden Prairie, MN) Reviewed for a 2016 Toyota 4Runner —4/14/2018 8:14 AM
K&N may offer performance increases, many discussions on this subject, most of us believe the pants increase in HP. The primary reason to buy K&N filter (engine or cabin) is the wash and replace feature and the cabin filter is yet another game changer. My reason for not giving a 5 star is I noticed an increase in noise coming from the air box but overall a great product. I will also say I am a loyal K&N customer, I use their oil filters (Gold), engine air filter and now the cabin filter.