Most on here...T4R.org, think these are snake oil.
Not sure about the one you posted but the series 63 is the one for our v6 4runners I believe. Have had one on for 5+ years.
https://www.knfilters.com/search/pro...x?prod=63-9023
Sadly they only really make the motor louder.
To get any real improvement you need to add the URD MAF.
just plug it in.
https://www.urdusa.com/urd-maf-senso...lay-version-1/
or a wired in version for $40 less (have to splice into the factory wiring)
https://www.urdusa.com/urd-maf-sensor-calibrator/
The K&N will not improve your MPG...it goes the other way.
To improve throttle response try this intake spacer.
Toyota Gen2 Products | eXtreme Truck Performance ? XTP IMS intake manifold spacers for Nissan, Toyota & Suzuki with 4.0 engines for performance gains!
