( Brand: Motornets ), ( Part Type: Tube Exhaust Header ), ( Material: Stainless Steel ), ( Manufacturer Part Number: 9955 ), ( Manufacturer Warranty: 2 Year )
Review MOTORNETS Sbc Chevy 383 Gmc Pickup Long Tube Exhaust Headers Kit fits 305 327 350 400 1966-87
Introducing the Motornetics 9955 Tube Exhaust Headers Kit, a high-performance aftermarket solution designed specifically for 1966-1987 Chevrolet 305, 327, 350, 383, and 400 engines, as well as their GMC counterparts. This exhaust headers kit is an excellent upgrade for muscle car enthusiasts and hot rodders seeking improved engine performance and an enhanced exhaust note.
The Motornetics 9955 headers are constructed from premium 304 stainless steel, ensuring durability, strength, and resistance to corrosion. Each header comes with a deep-flow design, which allows for increased exhaust gas velocity, resulting in better scavenging and improved engine breathing. This, in turn, translates to increased horsepower and torque, as well as improved engine response and throttle sensitivity.
The headers in this kit feature a 1.625-inch primary tube diameter and a 1.75-inch collector size, ensuring a smooth and efficient exhaust flow. They also come with a 5-bolt flange design, which is compatible with factory exhaust systems and aftermarket exhaust systems using a 5-bolt flange. This makes the installation process straightforward and hassle-free, even for those without extensive mechanical experience.
One of the key benefits of the Motornetics 9955 headers is their ability to provide optimal exhaust gas temperature (EGT) readings for tuning and adjusting the engine's performance. The headers are designed to minimize exhaust gas turbulence, ensuring stable and consistent EGT readings, which are crucial for achieving optimal engine performance.
Additionally, the headers come with rolled edges to prevent exhaust leaks and provide a smooth transition between the header and the exhaust system. This attention to detail ensures a leak-free installation and a clean, professional appearance.
The Motornetics 9955 Tube Exhaust Headers Kit is a must-have upgrade for any muscle car or hot rod enthusiast looking to maximize engine performance and enhance the exhaust note of their 1966-1987 Chevrolet 305, 327, 350, 383, and 400 engines or their GMC counterparts. With their premium construction, deep-flow design, and smooth installation process, these headers offer unparalleled value and performance for your vehicle.
Pros and Cons of Buying Motornet's 9955 Exhaust Headers Kit for 1966-87 Chevy and GMC 305, 327, 350, 383, and 400 Engines
1. Pros:a. Enhanced Performance: Motornet's headers are designed to improve engine performance by reducing exhaust backpressure and providing better scavenging.
b. Improved Gas Mileage: By increasing exhaust flow and reducing backpressure, the headers can help improve your vehicle's fuel efficiency.
c. Better Sound: The headers offer a deeper and more aggressive exhaust note, which is a desirable feature for many performance enthusiasts.
d. Durable Construction: The headers are made from high-quality steel, providing durability and resistance to corrosion.
e. Easy Installation: The headers come with all necessary hardware and instructions, making the installation process relatively straightforward for most DIYers.
2. Cons:a. Expensive: Compared to stock exhaust systems, aftermarket headers like the Motornet 9955 kit can be quite pricey.
b. Requires Custom Exhaust System: To use the headers, you'll need to fabricate or purchase a custom exhaust system, which can add to the overall cost and complexity of the project.
c. Potential for Increased Emissions: Depending on the specific application and tuning, the headers may cause an increase in exhaust emissions, which could result in failed emissions tests or fines.
d. Potential for Combustion Leaks: The headers can be susceptible to combustion leaks if not properly installed or if the engine gasket surfaces are damaged.
Conclusion:The Motornet 9955 exhaust headers kit offers several benefits, including improved engine performance, better gas mileage, and a more aggressive exhaust note. However, the kit also comes with some drawbacks, such as its high price, the need for a custom exhaust system, potential emissions issues, and the risk of combustion leaks. Ultimately, whether or not this headers kit is a worthwhile investment for your specific application depends on your priorities, budget, and technical abilities.
Recommendation:If you're looking to significantly improve the performance of your 1966-87 Chevy or GMC with a 305, 327, 350, 383, or 400 engine, and you're willing to invest the time, money, and effort into the project, then the Motornet 9955 headers kit could be a good choice for you. However, if you're on a tight budget or aren't comfortable with the complexity of the installation process, you may want to consider alternative performance upgrades or stick with the stock exhaust system.
specifications maniheader:
- for models: 305, 327, 350, 400
- for makes: Chevy, Gmc
- for years: 1966-87
- brand: Motornets
- part type: Tube Exhaust Header
- material: Stainless Steel
- manufacturer part number: 9955
- manufacturer warranty: 2 Year
shipping maniheader:
- service: UPS Ground, UPS 3 Day Select
- cost: $0.00
- carrier: UPS
- type: Fixed
- transit: 3-8 Days
- class: Standard, Expedited
seller maniheader:
- # reviews: 71584
- rating: 98.5%
offer maniheader:
- availability: In Stock
- quantity: 10
- started: August 27, 2025
- sold: 0
- options: Ship-to-home
general maniheader:
- Car Truck Parts Accessories > Exhaust Emission Systems > Manifolds Headers
- condition: New
payments maniheader:
- other
- credit card: Visa
- wallet: Google-pay
returns maniheader:
- policy: Returns Accepted
- paid by: Seller
- time: 30 Days
