- Doug Thorley headers give approximate 15% increase in HP.
- Increases torque.
- Slight improvement in fuel mileage.
- Not legal for use in CA on pollution controlled motor vehicles.
- Direct bolt on application.
- Triple nickel plated construction.
Headers fit the 4.0L V6 Nissan Xterra/Frontier (D40), 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,2014, 2015, 2016
