. This is just a drop in filter in the stock box. This filter replaced my drop in K&N.
I was averaging 14mpg on trips. WELL i did my first gas tank on the true flow in bad traffic,a 8k foot mountain climb, and towed around a single waverunner all weekend and i averaged 17mpg!!!!! FIRST TIME EVER have i hit that number. on the way home from big bear i filled up at the bottom of the mountain and it was 50 miles to home. this tank is looking the same way. WOOHOOO!!! i sure hope this isnt a fluke
Now before you naaa sayers speak up. YES i have the corrected speedo gear, and yes i did the math twice. 244 miles divided my 14 gallons of gas