Flowtech Headers are the perfect combination of quality and value. This header fits the popular 2004-08 Ford F-150 V8-5.4L 2WD/4WD. This header features 1-5/8" primary tubes and a 2-1/2" collector for increased exhaust flow for increasing performance, improving throttle response and providing a broad torque curve. This header accommodates all emission control devices and comes with premium aluminum header gaskets and hardware. 50 state legal - CARB EO D-115-19
Specifications:
- Header style: Shorty
- Primary tube diameter: 1-5/8 in
- Collector diameter: 2.50 in
- Material: Mild Steel
- Finish: Black Paint
- Engine: Ford
- Mounting hardware and gaskets included
- CARB (California) emissions compliant: Yes (EO D-115-19)
- Part number: 91673FLT
Vehicle Applications:
- 2007 Ford F-150 FX2
- 2008 Ford F-150 FX2
- 2004 Ford F-150 FX4
- 2005 Ford F-150 FX4
- 2006 Ford F-150 FX4
- 2007 Ford F-150 FX4
- 2008 Ford F-150 FX4
- 2006 Ford F-150 Harley-Davidson Edition
- 2007 Ford F-150 Harley-Davidson Edition
- 2008 Ford F-150 Harley-Davidson Edition
- 2005 Ford F-150 King Ranch
- 2006 Ford F-150 King Ranch
- 2007 Ford F-150 King Ranch
- 2008 Ford F-150 King Ranch
- 2004 Ford F-150 Lariat
- 2005 Ford F-150 Lariat
- 2006 Ford F-150 Lariat
- 2007 Ford F-150 Lariat
- 2008 Ford F-150 Lariat
- 2008 Ford F-150 Limited
- 2008 Ford F-150 THE 60TH ANNIVERSARY EDITION
- 2004 Ford F-150 XL
- 2005 Ford F-150 XL
- 2006 Ford F-150 XL
- 2007 Ford F-150 XL
- 2008 Ford F-150 XL
- 2004 Ford F-150 XLT
- 2005 Ford F-150 XLT
- 2006 Ford F-150 XLT
- 2007 Ford F-150 XLT
- 2008 Ford F-150 XLT
- 2008 Ford F-150 XTR
FAQ
What vehicles does the Flowtech 91673FLT header fit?
It fits 2007 Ford F-150 FX2; 2008 Ford F-150 FX2; 2004 Ford F-150 FX4; 2005 Ford F-150 FX4; 2006 Ford F-150 FX4; 2007 Ford F-150 FX4; and 26 more configurations. See the Vehicle Applications list for the full fitment.
Are mounting hardware and gaskets included?
Yes. Flowtech supplies the mounting hardware and header gaskets for installation.
Is this header legal in California?
Yes. Flowtech lists this part as CARB (California) emissions compliant under EO D-115-19.
What finish is this header?
Black Paint.

