Starting off this powerful package are aFe's "Race Only" Twisted Steel headers, constructed out of 1-5/8", 409 stainless steel tubing with thick CNC machined flanges to ensure a leak-free seal. For added power, aFe's performance package also includes a massive 3" into 3 1/2", "Y-pipe" with two high-flow cats for optimum flow. In recent testing, this performance package resulted in a max gain of 11 hp and 20 lbs x ft.of torque over stock vehicle. This package is direct bolt-on and requires no cutting or drilling to provide a hassle-free installation.
Twisted Steel Headers
aFe headers incorporate a merge collector design reducing the turbulences that occur when using the traditional form collector style designs. The performance gains are obvious when coupled with a high-flow Y-pipe. The 409SS headers feature a tuned length primary that is 1-5/8 in diameter outflowing the F-150 stock manifolds by as much as46%.
Massive Performance Y-pipe
aFe offers their performance Y-pipe with or without catalytic converters and feature 3" to 3-1/2" mandrel-bent 409 stainless steel construction. The catted Y-Pipe incorporates two hi-flow metallic spun catalytic converters (49 State or Canada Legal). Major increases flow over the stock Y-pipe is achieved while retaining O2 locations for a hassle-free bolt-in installation. Each Y-pipe is designed using a merge collector that utilizes a 3" to 3-1/2" transition for optimum flow while removing turbulences which are known to reduce performance found in traditional form collectors.
High-flow 49 State Catalytic Converters
The F-150 hi-flow Y-pipe utilizes 300 CPSi cats, which keep the system a true bolt-on and go solution. aFe installs the cats in the correct location, which eliminates any installation hassles, and free of check engine light making a true bolt-on system.
Fitment: 2011-2014 Ford F-150( V8-5.0L )