2021-2025
2015-2020
2009-2014
2004-2008
1997-2003
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
FREE 1 to 3-Day Delivery on Orders $119+ Details
Talk to a F-150 Sales Tech
1-888-706-1096
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Get $80 Off
Redeem Now >
Find Header & Mid-Pipe Kits for your F-150
Flowtech 1-5/8-Inch Shorty Headers; Black Painted (04-08 5.4L F-150)Find parts that fit my vehicle
Item T556104
$413.96
10 Reviews
On Sale
-10% $413.96 kit Was $459.95
Will this fit your Vehicle?
Saved - View your saved items
We're sorry. We couldn't save this product at this time.
or use
Frequently Bought Together
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Increase Horsepower and Torque
- Improve Exhaust Sound
- Short Tube Header Design
- Retains OE Catalytic Converters and Mid-Pipe
- Feature 1.62-Inch Primary Tubes with 2.50-Inch Collector
- Free-Flowing Mandrel-Bent Tubing
- Durable Cold-Rolled Mild Steel Construction
- Coated with a Temporary Black Paint
- Street-Legal Design
- CARB Certification E.O. Number D-115-19
- Require Calibration for Operation
- Fits All 2004-2008 5.4L Ford F-150 Models
| Brand | Flowtech |
| Headers Type | Shorty Headers |
| Header Primary Size | 1.50-1.75 Inch |
| Header Collector Size | 2.50 Inch |
| Header Finish | Raw |
Description
Increased Horsepower and Torque.Improve the overall performance of your Ford F-150 with these Flowtech 1-5/8-Inch Shorty Headers; Black Painted. They feature a free-flow design that promotes improved exhaust flow, increasing power and torque. With the increase in power that these headers provide, you can push your truck harder in aggressive driving conditions with ease.
Superb Exhaust Tone.These Flowtech Shorty Headers feature a 1.62-inch diameter primary tube that is designed to enhance the efficiency of your vehicle's exhaust flow. This allows for the exhaust to exit more smoothly and faster, producing an aggressive exhaust tone each time you step on your accelerator.
Reuses Factory Catalytic Converters. These Shorty Headers are compatible with your F-150's factory exhaust components, including your OEM mid-pipe and catalytic converters. By reusing the stock cats, your vehicle remains street-legal.
Heavy-Duty Quality. The durable construction of these headers ensures reliable performance that lasts years. They are made of high-quality, cold-rolled mild steel for remarkable strength. They are also mandrel-bent to ensure smoothness and consistent tubing diameter. Additionally, these headers feature TIG-welded and machined flanges to guarantee leak-free performance.
Rugged Black Coating. These Headers feature a temporary, non-high temperature black coating. Please note that this coating is designed to burn off during use. AmericanTrucks recommends overlaying high-temperature paint or other coatings on these headers.
Tuning Required. The use of these Shorty Headers will require a hand-held tuner to reprogram your truck’s (ECU) for operation. By reprogramming your F-150's ECU, you will be able to enjoy the full range of power that these headers are designed to provide.
CARB-Certified. For your peace of mind, these Shorty Headers are 50-state smog legal under CARB E.O. number D-115-19. This means they may be used on pollution-controlled vehicles.
Application.These Flowtech 1-5/8-Inch Shorty Headers; Black Painted are specifically designed for use on all 2004-2008 5.4L Ford F-150 models.
Fitment:
DetailsFlowtech 91673FLT
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (2) Shorty Headers
- (2) Sets of Aluminum Gaskets
- Installation Hardware
4.5
Customer Reviews (10)
Reviews of Flowtech Exhaust products have an average rating of 4.4 out of 5
Questions & Answers
No questions about this product yet.
Ask the First Question
Will It Fit My F-150
- 5.4L V8 - 04, 05, 06, 07, 08
