Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
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Flowtech 1-5/8-Inch Shorty Headers; Raw (14-15 V8 Silverado 1500)Find parts that fit my vehicle
Item S143977
Our Price
$415.95 kit
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$20.80 Available in AT Cash Rewards.
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Mandrel-bent 409 stainless steel 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, enhancing 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 ensures a leak-free seal and maximum strength
- Premium aluminum header gaskets included
- Available in natural, polished, high temp black paint, and ceramic coated finishes
- Popular shorty header design ideal for LT-swaps
- Bolt size: M8 x 1.25 x 25mm
- Collector attachment: 3-bolt flange
- Collector diameter: 2.50 in
- Collector port diameter: 2.50 in
- Emissions legal for racing use only vehicles
- Engine compatibility: GM Gen III/IV (LS)
- Flange size: 3/8 inch
- Flange thickness: 0.375 in
- Grade type: Performance
- Header style: Shorty
- Main piping diameter: 1-5/8 in
- Material: 409 stainless steel
- Mounting hardware included
- Oxygen sensor port: No
- Pipe wall gauge: 16 gauge
- Port shape: Oval
- Sheen level: Semi-gloss
- Sub category: Exhaust manifolds
- Tube material: 409 stainless steel
- Fits 2014-2015 V8 Silverado 1500
| Brand | Flowtech |
| Headers Type | Shorty Headers |
| Header Primary Size | 1.76-2.00 Inch |
| Header Collector Size | 2.50 Inch |
| Header Finish | Raw |
Description
Shorty Header Performance. The Flowtech 1-5/8-inch Shorty Headers in raw finish are engineered to optimize exhaust flow for 2014-2015 5.3L and 6.2L V8 Silverado 1500 trucks. These headers improve engine performance by increasing exhaust velocity and throttle response, providing a reliable, direct-fit upgrade for enthusiasts seeking enhanced power.
Construction and Appearance. Made from mandrel-bent 409 stainless steel with heavy-duty 16-gauge tubing, these headers offer durability and consistent exhaust flow. The natural finish features a semi-gloss silver sheen that delivers a clean, rugged aesthetic while resisting corrosion under normal use.
Installation. Installation is straightforward, utilizing an OE-style 2-1/2-inch ball and socket collector that mates seamlessly with factory exhaust head pipes. No cutting, welding, or drilling is necessary. Standard tools and basic mechanical skills are sufficient to complete the installation.
Application. These shorty headers are specifically designed to fit 2014-2015 5.3L and 6.2L V8 Silverado 1500 models, compatible with both 2WD and 4WD configurations within this range.
Flowtech 11547FLT
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) Header Assembly
- (2) Gaskets
- Mounting Hardware
4.4
Customer Reviews (23)
Questions & Answers
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Will It Fit My Silverado 1500
- 5.3L V8 - 14, 15
- 6.2L V8 - 14, 15
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