2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
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Flowtech 1-5/8-Inch Shorty Headers; Black Painted (03-04 6.0L Sierra 1500)Find parts that fit my vehicle
Item S525076
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10 Reviews
Our Price
$415.95 kit
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Remarkable Increase in Horsepower and Torque
- Aggressive Exhaust Sound
- Short Tube Header Design
- Retains Factory Catalytic Converters and Mid-Pipe
- Equipped with 1.62-Inch Primary Tubes with 2.50-Inch Collector
- High-Flow, Mandrel-Bent Tubing
- Made of Cold-Rolled Mild Steel
- Heat-Resistant, Black Coating
- Street-Legal Design
- Bears the CARB Certification E.O. Number D-115-16
- Tuned Headers
- Fits All 2003-2004 6.0L GMC Sierra 1500 Models
| Brand | Flowtech |
| Headers Type | Shorty Headers |
| Header Primary Size | 1.50-1.75 Inch |
| Header Collector Size | 2.50 Inch |
| Header Finish | Painted |
Description
Remarkable Horsepower and Performance. Bring out your 6.0L Sierra 1500’s full potential with these Flowtech 1-5/8-Inch Shorty Headers; Black Painted. Featuring an unrestricted design, these headers produce maximum exhaust flow, which increases your vehicle’s power and torque. This provides you with the power that you require to match your needs without breaking the bank.
Impressive Sound. These Flowtech Shorty Headers feature a 1.62-inch diameter primary tube for unrestricted exhaust flow. This allows for a smoother exhaust exit which produces an aggressive sound each time you open the throttle.
Uses Factory Catalytic Converters. These Shorty Headers retain the factory exhaust components of your truck, including the mid-pipe and catalytic converters. This maintains your vehicle’s street-legal status for worry-free driving all over the United States.
Built for Aggressive Applications. The highly durable construction of these headers ensures excellent performance for years. They are made of high-quality, cold-rolled mild steel for superior durability. They are also mandrel-bent for smoothness and consistent tubing diameter. Lastly, these headers’ 0.37-inch-thick flanges are TIG-welded and machined to guarantee leak-free performance.
Heat-Resistant Black Coating. These Headers feature high-quality black paint. This offers improved resistance to heat and corrosion to ensure longer-lasting service.
Tuned Headers. Setting up these Shorty Headers on your truck won't require calibration for operation. However, a retune is ideal so you can take advantage of the full range of power that these headers offer.
CARB-Certified Design. These Shorty Headers are 50-state smog legal under CARB E.O. number D-115-16. For this reason, they may be installed on pollution-controlled vehicles.
Application. These Flowtech 1-5/8-Inch Shorty Headers; Black Painted are designed to fit all 2003 to 2004 6.0L GMC Sierra 1500 models.
Fitment:
DetailsFlowtech 91835FLT
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Driver Side Header
- (1) Passenger Side Header
- (2) Header Gaskets
- Mounting Hardware
4.5
Customer Reviews (10)
Questions & Answers
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Will It Fit My Sierra 1500
- 6.0L V8 - 03, 04
