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Description
Flowtech Shorty Headers for 2014-2015 Chevy Silverado/Tahoe 5.3L/6.2L Polished Finish 11549FLTOverview: Flowtech Headers are the perfect combination of quality and value. These shorty style headers fit the popular 2014 2015 Chevy GMC Silverado Tahoe Yukon 5. 3L & 6. 2L V8, 2WD 4WD models. Features: 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 are used for
Overview:
Flowtech Headers are the perfect combination of quality and value. These shorty style headers fit the popular 2014-2015 Chevy/GMC Silverado/Tahoe/Yukon 5.3L & 6.2L V8, 2WD/4WD models.
Features:
- 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 are used for increased exhaust flow increasing performance and improving throttle response
- OE style 2-1/2” ball and socket collector connects to factory exhaust head pipe with no cutting or welding
- TIG-welded, machined 3/8” header flange for a leak-free seal and maximum strength
- Premium aluminum header gaskets included
- Available finishes include Natural, Polished, High Temp Black paint, and Ceramic Coated finishes
- Popular shorty header for LT-Swaps
Applications:
| Year | Make | Model | Engine |
| 2014-2015 | Chevrolet | Silverado 1500 | 5.3L V8 |
| 2014-2015 | Chevrolet | Silverado 1500 | 6.2L V8 |
| 2014-2015 | Chevrolet | Silverado 2500 | 5.3L V8 |
| 2014-2015 | Chevrolet | Tahoe | 5.3L V8 |
| 2014-2015 | GMC | Sierra 1500 | 5.3L V8 |
| 2014-2015 | GMC | Sierra 1500 | 6.2L V8 |
| 2014-2015 | GMC | Yukon | 5.3L V8 |
| 2014-2015 | GMC | Yukon | 6.2L V8 |
| 2014 | GMC | Yukon XL 1500 | 5.3L V8 |
| 2014 | GMC | Yukon XL 1500 | 6.2L V8 |
| 2015 | GMC | Yukon XL | 5.3L V8 |
| 2015 | GMC | Yukon XL | 6.2L V8 |
Specs:
| Brand | Flowtech |
|---|---|
| Collector Diameter | 2.50 inch |
| Bolt Size | M8 x 1.25 x 25mm |
| Emission Code | 4 |
| Engine | GM Gen III/IV (LS) |
| Flange Size | 3/8 Inch |
| Header Finish | Polished |
| Header Style | Shorty |
| Primary Tube Dia. | 1-5/8 inch |
| Product Type | Headers |
| Tube Material | 409 Stainless Steel |
| Warning | California Proposition 65 |
Emissions:
- This part is legal for sale or use on Racing Use Only Vehicles
- The following vehicles are considered Racing Use Only Vehicles:
- Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.
- WARNING: It is against the law to install this part on an Emissions Controlled Vehicle
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Works
Size: For 60 65 70 75 HP
Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
★★★★★ 4
Great product
Size: For 85-300 HP
Complete rebuild kit for $38 and great quality and fast delivery
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Reviewed in the United States on August 30, 2025
★★★★★ 5
If pump doesn't seem to work
Size: For 85-300 HP, Size: For 85-300 HP
Hi....I apologize it took me a while to get back to you with my results. Here is what I discovered about the pump and will also apply to some of the other comments I read in the reviews with people not getting the pump to work:
1.) I removed the pump to check the proper direction of the impeller and it was correct as can be seen in the photo.
2.) I built a pump shaft attachement so that I could operate the pump with a power drill.
3.) I attached the water muff to the unit and tried to pump water.....it wouldn't do so. What I did see however was that even at high hose discharge and small leakage at the muff I could not fill the water cavity in the housing.
4.) I installed a strap around the muff and tightened it very tight and THEN at high hose pressure I was able to get the cavity to fill with water.
5.) At that point I activated the drill and was able to get the pump to actually pump water. I then removed the pump housing and removed the O-Ring that resides on top of the impeller, reassembled and it would not pump water. Since the O-Ring sits higher than the original does I wanted to make sure that it was necessary to have it in the pump.
6.) I reassembled the engine and kept the tight strap on the bottom and finally it pumped water into the engine.
My conclusion that you can reply to other buyers if they have a problem:
Do NOT underestimate 2 things....1.)the lack of ability of the pump to draw water up AND 2.)the fact that if the muff leaks it will NOT fill the cavity when common sense says it should. This was a 120hp Johnson. The engine bottom must be immersed fully or the muff must be very tight on the lower unit for the pump to function.
Please feel free to post this if you wish.
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Reviewed in the United States on August 12, 2024
★★★★★ 5
Exelente
Size: For 85-300 HP
Exelente
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Good as new
Size: Package Dimensions 6.02 x 4.02 x 2.05 inches
Fitment was great and works as it should. Good quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2025