
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
For Your Every Summer RSVP, with Code: SUMMER15
Description
Flowtech Headers Black Shortie CHEV 325 376 SILVERADO 1500 GMC # 11548FLTFlowtech Headers Black Shortie CHEV 325 376 SILVERADO 1500 GMC # 11548FLT DETAILS Header Style: Shorty Header Material: Stainless steel Header Finish: Black Weld Up: No Primary Tube Diameter (in): 1 5 8 in. Flange Style: Standard Collector Attachment: Stock flange Collector Diameter: 2. 500 in. Collector Reducers Included: No Cylinder Head Port Shape: Oval Tuned: No Primary Tube Gauge: 16 gauge Flange Thickness (in): 3 8 in. Bolts Studs Included: Yes
Flowtech Headers Black Shortie CHEV 325 376 SILVERADO 1500 GMC # 11548FLTDETAILS
Header Style:Shorty
Header Material:Stainless steel
Header Finish:Black
Weld-Up:No
Primary Tube Diameter (in):1 5/8 in.
Flange Style:Standard
Collector Attachment:Stock flange
Collector Diameter:2.500 in.
Collector Reducers Included:No
Cylinder Head Port Shape:Oval
Tuned:No
Primary Tube Gauge:16-gauge
Flange Thickness (in):3/8 in.
Bolts/Studs Included:Yes
Gaskets Included:Yes
Crossover Pipe Included:No
Catalytic Converter(s) Included:No
Motor Mounts Included:No
Transmission Mount Included:No
Quantity:Sold as a pair.
Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximum performance, they feature the industry's best welds for durability and are carefully engineered for precise fit. Available for an wide range of applications, they are offered in block hugger, competition, fenderwell, lakester, long tube, mid-length, shorty, upright, and turbo styles. Varying with the application, Flowtech headers are constructed from sturdy and lightweight cold-rolled mild steel or stainless steel for increased strength and durability. All tubing is mandrel-bent to provide consistent tubing diameter for smooth flow and increased exhaust velocity. Extra-thick, machined header flanges provide a leak-free seal and maximum strength. For long-term rust and corrosion-resistance, available finishes include natural and polished stainless steel, high heat-resistant black paint, or a satin silver metallic ceramic thermal barrier coating. All mounting hardware and premium gaskets are included.Depending on application, features may include: Shorty-style headers will work with catalytic converter equipped vehicles; head pipe fabrication may be required Leakproof O-ringed port seals on select headers Available to work with factory power steering and power brakes Where applicable, welded-in collector merge spears control exhaust gas re-entry into primary tubesImportant notes: Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Flowtech does not recommend the use of header wraps as this will void the warranty.
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
4.2 ★★★★★
Based on 1975 reviews
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Product Reviews
★★★★★ 4
Really great shirt, really thick material
An unexpected pleasant surprise. Really nice quality, minimal shrinkage, and very few wrinkles out of the dryer. Nice, comfortable fit, and for big-but-not-tall guys, the fitment is very presentable. Sleeves aren't crazy long, and the shirt itself isn't so long that you feel like you're wearing a dress.
These aren't complaints, but I do want to share two notes that were important to me:
1. If you want a breast pocket, be sure to select the right shirt. There are two different versions, and it's not particularly obvious which is which.
2. The material is thick. Really thick. So the shirt is pretty heavy, and it doesn't breathe very well. For me, this is unquestionably a winter shirt. If, like me, you tend to run a bit warm, this shirt can make you feel like you're wearing a parka.
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Reviewed in the United States on October 6, 2023
★★★★★ 5
Great Value from Amazon Essentials
I can’t believe the quality of this shirt given the low price I paid for it. It fits perfectly, looks impressive, and is very comfortable. The shirt has survived two washes so far and looks as good as new. I couldn’t be more satisfied with this purchase.
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Reviewed in the United States on December 11, 2025
★★★★★ 1
Too large, length too long
Size: Medium, Color: Light Grey Vertical Stripe
Runs large, and the length is far too long to wear untucked like in the photos. Always wear a Medium, this fits like a Large. Length of shirt is long and obviously made to be tucked in. You would look ridiculous if you left it untucked. Dont understand why companies still insist on designing shirt to be tucked in when most people dont wear it like that these days
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Great shirt
Size: 6X-Large Big, Color: Pale Pink
Amazing deal
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Traditional Grown Man Shirt
Size: Large, Color: Light Grey Vertical Stripe
Great cotton, classically-style button down shirt for guys not wanting anything slim fit, this shirt size is legitimate. It’s a nice heavyweight cotton shirt. I don’t think I’d say it was wrinkle resistant but it doesn’t take much effort to press this garment.
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Reviewed in the United States on January 20, 2026