Replacing the highly inefficient and failure-prone factory exhaust manifolds on your 2004 to 2008 F150 should be one of your top priorities. The stock manifolds are notorious for having back pressure that chokes your motor off from making decent power. Add even more sound and performance with one of our F150 Cat Back Exhaust Systems. Ford F-150 Fitments: 2004, 2005, 2006, 2007, 2008 Ford F150 with 4.6L or 5.4L engines. Submodel Fitments: FX2, FX4, King Ranch, Lariat, STX, XL, XLT. Some Exceptions apply, please see individual product pages for specific fitments.
