No it will not. If you have more air exhaust going out you have more air/fuel coming in thus more power but less fuel economy. Its a trade off.
The EPA mileage estimate for the 2014 Nissan Titan is 13 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2007 Nissan Titan is 12 mpg in the city, 17 mpg on the highway.
The EPA mileage estimate for the 2010 Nissan Titan is 13 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2006 Nissan Titan is 13 mpg in the city, 17 mpg on the highway.
The EPA mileage estimate for the 2011 Nissan Titan is 13 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2013 Nissan Titan is 13 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2009 Nissan Titan is 13 mpg in the city, 17 mpg on the highway.
The EPA mileage estimate for the 2005 Nissan Titan is 13 mpg in the city, 17 mpg on the highway.
The EPA mileage estimate for the 2008 Nissan Titan is 12 mpg in the city, 17 mpg on the highway.
The EPA mileage estimate for the 2012 Nissan Titan is 13 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2004 Nissan Titan is 13 mpg in the city, 17 mpg on the highway.
Leave it parked and don't drive it.