Who knows? it's dependant on how much I use the skinny pedal. It's a V8 so I don't try to see what kind of mileage I can get out of it usually average 17mpg in the city up to 20 highway. Again I have different gears, 4:11's with 32" (275/65R18 Cooper STT Discovery)
IMO K&N is not as good, they over oil their filters and can cause a CEL due to a dirty Mass Air FLow Sensor, over a period of time. It happened to me... There's also a lot more flow again IMO with the Volant you can hear the difference between the two. Get what you pay for...
As requested, I had my camera on the floor in the back hoping to capture the sound but got a lot of tire noise anyway.... around second 35 I floor it and you can hear it.
Click Here
Yet another mod that is listed as not fitting a 2007 or 2008 4Runner FITS and works just fine. The sound, in combination with the TRD Exhaust, (off the 4.0L, also fits) and the URD Y Pipe is amazing.
URD Tacoma 4x4 on a 4gen 08 4Runner V8
I have to say it was quite the job but after 4 cuts the URD Y pipe for the 4X4 Tacoma fits a V8 4th gen 4Runner. If you have some welding experience it's not that bad 3 hours...