what will a K & N air filter do for my 2008 mustang v6?
one of my friends told me to get the K & N air filter system because it will get me better gas mileage and alto more horse power is this true?
Maybe. There's a chance your performance will suffer. Changing out the air filter to permit better breathing can throw off the fuel-air mix and make the engine run poorly and deliver worse economy than you're getting now. You may have to change a sensor