Installation Time
(approx) 2 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Flowtech 1-5/8-Inch Shorty Headers; Black Painted (02-13 4.8L, 5.3L Sierra 1500)Find parts that fit my vehicle
Item S525017
Our Price
$531.95 kit
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$26.60 Available in AT Cash Rewards.
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
- Heavy duty 16-gauge tubing for increased strength and durability
- Smooth transition, 1-5/8” diameter primary tubes increase exhaust flow, improving performance and throttle response
- OE style 2-1/2” ball and socket collector connects to factory exhaust head pipe with no cutting or welding required
- TIG-welded, machined 3/8” header flange for a leak-free seal and maximum strength
- Premium aluminum header gaskets included
- Coated in high heat resistant black paint for durability
- Headers are recommended when using a cold air intake, cat-back exhaust system, or tuner
- C.A.R.B. EO# D-115-20 for emissions compliance
- Fits 2002-2013 4.8L and 5.3L GMC Sierra 1500 and Chevrolet Silverado 1500
| Brand | Flowtech |
| Headers Type | Shorty Headers |
| Header Primary Size | 1.50-1.75 Inch |
| Header Collector Size | 2.50 Inch |
| Header Finish | Painted |
Description
Performance Exhaust Upgrade. The Flowtech 1-5/8-Inch Shorty Headers Black Painted are engineered to enhance exhaust flow and boost engine performance on compatible GM V-8 vehicles. They replace factory exhaust manifolds to increase throttle response and power output, making them an essential upgrade for enthusiasts seeking a more efficient exhaust system.
Construction and Appearance. Constructed from heavy duty 16-gauge mild steel, these headers feature mandrel-bent primary tubes for consistent diameter and smooth exhaust flow. A TIG-welded, machined 3/8” flange ensures durability and a leak-free seal. Finished with high heat resistant black paint, they provide a professional satin appearance that withstands harsh operating conditions.
Installation. These shorty headers install directly to the factory Y-pipe and emissions equipment without any cutting or welding. Installation requires basic mechanical skills and no drilling, allowing for a smooth upgrade process.
Application. Designed to fit 2002 to 2013 Chevrolet Silverado and GMC Sierra 1500 trucks equipped with 4.8L and 5.3L V-8 engines, ensuring a reliable, emissions-legal performance enhancement.
Flowtech 91843FLT
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) Headers
- (2) Gaskets
- Installation Hardware
4.4
Customer Reviews (22)
Questions & Answers
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Will It Fit My Sierra 1500
- 4.8L V8 - 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
- 5.3L V8 - 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13
