Flowtech Shorty Headers D-115-16 Black 16 Gauge 3/8″ Flange

Description

Product Overview

Flowtech Shorty Headers D-115-16 are engineered as a direct‑fit replacement for the original exhaust manifolds found on a wide range of medium‑duty trucks. Constructed from high‑strength 16 gauge steel, each header offers a balance of durability and weight savings, ensuring that the exhaust system can handle the rigors of daily driving as well as more demanding off‑road conditions. The exterior is machined to a sleek black finish that not only resists corrosion but also provides a professional appearance that complements any vehicle aesthetic.

One of the standout design elements is the oversized 3/8 inch flange that connects each header to the rest of the exhaust system. These flanges are deliberately thickened to create a leak‑free seal, reducing the risk of exhaust gases escaping and improving overall system efficiency. The headers are also designed to accommodate all factory‑installed emission control devices, meaning that they can be installed without the need for additional modifications or the removal of catalytic converters, oxygen sensors, or other critical components.

With a total weight of approximately 15.1 pounds, the Shorty Headers are lightweight enough to be handled easily during installation, yet robust enough to withstand the high temperatures generated by performance exhaust flow. The internal geometry has been optimized to promote smoother gas flow, which can translate into modest gains in horsepower and torque, especially in the low‑ to mid‑range where many trucks spend the majority of their operating time.

Each unit is identified by the model number 91834FLT, which matches both the manufacturer part number and the OEM part number, ensuring compatibility with existing inventory and replacement parts databases. The product has earned a solid reputation among truck owners, reflected in its customer review rating of 5.0 out of 5 stars based on verified purchases. Its ranking within the automotive performance exhaust headers category demonstrates its popularity among enthusiasts seeking reliable, high‑quality upgrades.

Usage

The Shorty Headers are ideal for a variety of use cases, ranging from daily commuting to heavy‑duty work trucks and even performance‑oriented builds. Because they are a direct‑fit solution, installation can be completed in a typical garage environment with standard hand tools, making them accessible to both professional mechanics and DIY enthusiasts. The robust construction ensures that the headers can handle the heat and pressure associated with towing, hauling, and off‑road adventures without warping or cracking.

Truck owners who frequently operate in dusty or corrosive environments will appreciate the machined black finish, which offers an added layer of protection against rust and surface wear. Additionally, the design’s compatibility with emission control devices means that the headers can be used in regions with strict emissions regulations, providing a legal upgrade that does not compromise compliance. Whether the vehicle is used for city deliveries, construction site transport, or weekend trail riding, the Shorty Headers deliver consistent performance and durability.

Why Choose Us

Choosing Flowtech means selecting a brand with decades of experience in exhaust system engineering. Each header undergoes rigorous quality control testing, including pressure testing, dimensional verification, and surface finish inspection, to ensure that every unit meets the high standards expected by professional installers and performance enthusiasts alike. The company’s commitment to precision manufacturing translates into a product that fits seamlessly, reduces installation time, and minimizes the need for post‑installation adjustments.

Beyond the product itself, Flowtech provides comprehensive customer support, including detailed installation guides, technical assistance, and a responsive warranty service. Should any issues arise during the installation or operation of the Shorty Headers, owners can rely on a knowledgeable support team to address concerns promptly. This level of after‑sales service reinforces the confidence that customers place in the brand, making the purchase a low‑risk investment for long‑term vehicle performance.

Key Features

• Direct‑fit design eliminates the need for custom fabrication, saving time and labor costs.
• 16 gauge steel construction provides superior strength and heat resistance for lasting durability.
• Oversized 3/8 inch flanges ensure a leak‑free seal and easy alignment with existing exhaust components.
• Machined black finish resists corrosion and matches the aesthetic of modern truck exteriors.
• Comes with dedicated customer support and a warranty to protect your investment.

FAQ

Will these headers fit my specific truck model?

The Shorty Headers D-115-16 are engineered as a direct replacement for a broad range of medium‑duty trucks. They match the OEM part number 91834FLT, which is used by many manufacturers. However, we always recommend verifying the fit with your vehicle’s VIN or consulting the fit guide on our website to ensure compatibility.

Do the headers require any additional modifications to the exhaust system?

No additional modifications are necessary for standard installations. The oversized 3/8 inch flanges are designed to bolt directly to the existing exhaust pipe connections, and the headers accommodate all factory‑installed emission control devices, so no removal or alteration of catalytic converters or sensors is required.

What is the expected improvement in performance?

While exact gains can vary based on the engine and overall vehicle setup, owners typically notice smoother exhaust flow, a modest increase in low‑ to mid‑range torque, and a more responsive throttle feel. The primary benefit is the reduction of exhaust back‑pressure, which can enhance engine efficiency.

How do I install the Shorty Headers?

Installation involves removing the factory manifolds, cleaning the mating surfaces, and bolting the new headers in place using the supplied hardware. Detailed step‑by‑step instructions are included in the packaging, and additional video tutorials are available on our website. If you are not comfortable performing the installation yourself, a qualified mechanic can complete the job in a few hours.

Is there a warranty on these headers?

Yes, Flowtech offers a limited warranty that covers manufacturing defects for a period of one year from the date of purchase. The warranty does not cover damage caused by improper installation, misuse, or external factors such as accidents.