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Best Flowing Chevy Exhaust Manifolds (2024 Updated)

If you’re looking for a better performance from your Chevy, then you might want to consider getting flowing Chevy exhaust manifolds to improve your car's performance. These manifolds are designed to improve the flow of exhaust gases, reducing restrictions and increasing power output. But before buying such products, there are a few key factors that you need to consider.

One key factor to consider is the quality of the exhaust manifolds. There are many different brands and types of exhaust manifolds available, so it's important to do some research and read reviews to find the most reliable and high-quality products. You also need to consider the compatibility of the manifolds with your specific Chevy model and other modifications to your car's engine.

To help you make the best decision, some questions you can ask yourself are: What are the benefits of flowing Chevy exhaust manifolds? How do they work? Can I install them myself, or do I need professional help? Is it worth the investment and will it improve my car's overall performance? By answering these questions, you can determine if flowing Chevy exhaust manifolds are the right choice for you, and take the first step towards enhancing your car's performance.

10 Best Flowing Chevy Exhaust Manifolds

# Product Image Product Name Product Notes Check Price
1
This product is ideal for replacing exhaust manifolds on 1988-1995 Chevy/GMC pickup trucks and vans with 5.7L or 5.0L engines.
2
This product is ideal for Chevrolet and GMC trucks with a 6.6L Duramax Diesel engine manufactured between 2001-2016.
3
This product is ideal for marine vehicles with Chevrolet 454 engines, providing efficient exhaust flow and durability.
4
Ideal for increasing air flow to improve engine performance in LS1, LS2, and LS6 engines.
5
This product is ideal for improving the exhaust and emissions performance of Chevy Silverado, Tahoe, GMC Sierra, and Yukon XL vehicles.
6
This product is ideal for repairing exhaust manifolds on select Chevrolet/GMC models, as it includes all necessary gaskets and hardware.
7
Ideal for repairing or replacing damaged exhaust manifolds on select vehicle models, including required gaskets and hardware.
8
Ideal for fixing or replacing the exhaust manifold on select Chevrolet/GMC models with included gaskets and hardware.
9
The product is ideal for marine exhaust systems on boats with Mercruiser 330, 340, MIE, 370 TRS or Chevy Marine 454 engines.
10
This product is ideal for repairing or replacing the exhaust manifolds in Chevy and GMC pickup trucks and vans manufactured between 1988 and 1995.
This product is ideal for replacing exhaust manifolds on 1988-1995 Chevy/GMC pickup trucks and vans with 5.7L or 5.0L engines.
This product is ideal for Chevrolet and GMC trucks with a 6.6L Duramax Diesel engine manufactured between 2001-2016.
This product is ideal for marine vehicles with Chevrolet 454 engines, providing efficient exhaust flow and durability.
Ideal for increasing air flow to improve engine performance in LS1, LS2, and LS6 engines.
This product is ideal for improving the exhaust and emissions performance of Chevy Silverado, Tahoe, GMC Sierra, and Yukon XL vehicles.
This product is ideal for repairing exhaust manifolds on select Chevrolet/GMC models, as it includes all necessary gaskets and hardware.
Ideal for repairing or replacing damaged exhaust manifolds on select vehicle models, including required gaskets and hardware.
Ideal for fixing or replacing the exhaust manifold on select Chevrolet/GMC models with included gaskets and hardware.
The product is ideal for marine exhaust systems on boats with Mercruiser 330, 340, MIE, 370 TRS or Chevy Marine 454 engines.
This product is ideal for repairing or replacing the exhaust manifolds in Chevy and GMC pickup trucks and vans manufactured between 1988 and 1995.

1. Exhaust Manifolds Left & Right Pair Set 5.7l 5.0l For 88-95 Chevy Gmc Pickup Van

The product comes with a 10-year warranty, which ensures that it is free from manufacturing defects during intended use. If the product fails due to these defects, the manufacturer will replace the part free of charge. The warranty covers only the part and not any modifications made to it. Therefore, it is recommended to contact the manufacturer before modifying the part to avoid voiding the warranty.

The product is sold in pairs and the reference numbers for these are 674156 and 674157.

Pros

  • The 10-year warranty provides peace of mind to the customer.
  • The manufacturer will replace the part free of charge if it fails due to manufacturing defects.
  • The product is sold in pairs for convenience.

Cons

  • – Any modifications made to the part before contacting the manufacturer will void the warranty.

2. Duraflow: High-Performance Driver Side Exhaust Manifold

This direct replacement product is designed to eliminate the problem of crushed manifold in 2001-2010 trucks. It is a factory-style replacement for the 2011-2016 GM 6.6L Duramax LML. This product is compatible with all 2001-2016 Chevy & GMC 6.6L LB7/LLY/LBZ/LMM/LML Duramax diesel trucks. Some factory hardware and fasteners will be re-used during installation of this product. It comes with a one-year warranty and has a high-flow upgrade available only for 2001-2010 trucks.

If you are looking to replace your damaged or faulty manifold, this direct replacement is a perfect solution. It is designed to fit perfectly and function just like the original one. With this product, you can be sure that your truck will run smoothly and efficiently.

The product is made of high-quality materials and is built to last. It is a reliable and durable replacement that will serve you well for a long time. If you are looking for a cost-effective and efficient solution to your manifold problem, this product is just what you need.

Pros

  • Direct replacement for damaged or faulty manifold
  • Eliminates the problem of crushed manifold in 2001-2010 trucks
  • Factory-style replacement for 2011-2016 GM 6.6L Duramax LML
  • Compatible with all 2001-2016 Chevy & GMC 6.6L LB7/LLY/LBZ/LMM/LML Duramax diesel trucks
  • Made of high-quality materials and built to last
  • Cost-effective and efficient solution

Cons

  • – Some factory hardware and fasteners will be re-used during installation
  • – High-flow upgrade available only for 2001-2010 trucks

3. Mercruiser 330 340 Mie Chevy Marine 454 7.4 7.4l Glm Exhaust Manifolds+4" Risers

If you have a Mercruiser MODEL 330-370, V8 (B.B.), GM 454/502 CID (1981 up to 0M SN#’s) and are in need of replacement exhaust manifolds and risers, this product may be for you. Please note that these parts are not suitable for dry joint manifolds, so be sure to review the product images carefully before purchasing.

The package includes two (2) exhaust manifolds and two (2) 4" 7° risers, providing a complete solution for your engine's exhaust system. These parts are designed to be durable and long-lasting, ensuring reliable operation for your vessel.

In order to ensure a proper fit, it's important to confirm that your engine matches the listed specifications. If you have any questions or concerns, it's recommended that you consult with a qualified marine mechanic before making a purchase.

Pros

  • Includes two exhaust manifolds and two 4" 7° risers for a complete replacement solution
  • Durable and long-lasting design for reliable operation
  • Designed for Mercruiser MODEL 330-370, V8 (B.B.), GM 454/502 CID (1981 up to 0M SN#’s)

Cons

  • – Not suitable for dry joint manifolds

4. Fast Lsxr 102mm Intake Manifold For Ls1, Ls2, And Ls6 (146302b), Black

Upgrade your LS engine's performance with this high-quality intake manifold. With longer runners and a larger air inlet than the stock manifold, this product delivers added horsepower while maintaining low-RPM torque. The sleek black finish adds stunning good looks to your engine. Plus, the modular, removable runner design makes disassembly and porting simple.

The advanced polymer material used in the construction of this intake manifold makes it lighter than aluminum and allows it to run much cooler. This product is C.A.R.B.-approved with no. D-279-8, so you can trust that it meets rigorous emissions standards. Fit type: Vehicle Specific

Pros

  • Longer runners and larger air inlet deliver added horsepower while maintaining low-RPM torque
  • Sleek black finish adds stunning good looks to any LS engine
  • Modular, removable runner design allows for easy disassembly and porting
  • Advanced polymer material makes intake lighter than aluminum and run much cooler
  • C.A.R.B.-approved with no. D-279-8, meeting rigorous emissions standards
  • Vehicle specific fit ensures easy installation

5. Silverado Sierra Catalytic Converter Combo

The Direct Fit Catalytic Converter Set is designed to fit several Cadillac Escalade and Chevy vehicles including the 2009-13 Cadillac Escalade Exhaust Manifold, 2002-13 Cadillac Escalade Exhaust Manifold, 2003-13 Cadillac Escalade ESV Exhaust Manifold, 2002-13 Cadillac Escalade EXT Exhaust Manifold, 2002-13 Chevy Avalanche 1500 Exhaust Manifold for V8 5.3L, 2003-13 Chevy Express 1500 Van Exhaust Manifold for V8 5.3L, and 2003-13 Chevy Express 2500 Van Exhaust Manifold for V8 6.0L. The set comes with one Left Side Catalytic Converter, one Right Side Catalytic Converter, two Flange Gaskets, two Donut Flange Gaskets, six Screws, and six Nuts as shown in the pictures. The OEM part numbers for this set are 674-522 01953L 12571679 327-01928 327-01928, 674-732 12602038 12616286 12569416 12569530 12578341. The catalytic converter set is made to meet the standard OE specifications for easy installation. Please note that this product is not CARB compliant.

The Direct Fit Catalytic Converter Set is an excellent replacement part for those with compatible vehicles. The set includes all necessary parts for installation and is made to meet standard OE specifications for a perfect fit. The OEM part numbers ensure that the set is of high quality and is designed to function like the original part. The product is easy to install and will help reduce harmful emissions from your vehicle.

This Direct Fit Catalytic Converter Set is a reliable and durable replacement part for your vehicle. The set is designed to fit several Cadillac Escalade and Chevy vehicles with compatible exhaust manifolds. The included parts make installation easy and the set is made to meet standard OE specifications. Although this product is not CARB compliant, it is an excellent choice for those looking to replace their catalytic converter set.

Pros

  • Designed to fit several Cadillac Escalade and Chevy vehicles with compatible exhaust manifolds
  • Includes all necessary parts for installation
  • Made to meet standard OE specifications for a perfect fit
  • Easy to install
  • Reduces harmful emissions from your vehicle
  • Reliable and durable replacement part

Cons

  • – Not CARB compliant

6. Chevy/gmc Exhaust Kit With Gaskets & Hardware

Upgrade your vehicle's exhaust system with this high-quality exhaust manifold. Precision-engineered and durably manufactured, this exhaust manifold is a perfect replacement for the stock manifold on specified vehicles. It is designed to offer an ideal fit and function, providing reliable performance that lasts for a long time.

The durable construction of this exhaust manifold ensures that it resists warping, cracking, and leaking. This feature guarantees that your vehicle's exhaust system will continue to work at optimal performance levels for a long time, without any issues. The manifold comes with all necessary gaskets and downpipe hardware to offer a complete repair solution.

This exhaust manifold is built by an industry leader in aftermarket manifolds, ensuring that you get a trustworthy design that meets the highest quality standards. The manufacturer uses only the best materials and manufacturing processes to ensure that the product is of the highest quality.

To ensure that this exhaust manifold fits your exact vehicle, simply input your make, model, and trim level into the garage tool. This feature guarantees that you get an exhaust manifold that is tailored to your car's specific requirements.

Upgrade your vehicle's exhaust system today with this high-quality exhaust manifold and enjoy reliable performance for a long time to come.

Pros

  • Precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles
  • Durable materials resist warping, cracking, and leaking for long-lasting performance
  • Complete repair solution includes all necessary gaskets and downpipe hardware
  • Built by an industry leader in aftermarket manifolds for trustworthy design
  • Tailored to fit specific vehicle requirements for an ideal fit and function
  • Offers reliable performance for a long time

7. Dorman Oe Fix Exhaust Kit – Complete Solution!

The replacement exhaust manifold is made of upgraded materials, specifically ductile iron, which makes it resistant to warping and cracking in the future. The kit comes complete with a new manifold, manifold gasket, flange gasket, three studs, and three nuts for a hassle-free installation. It is reverse engineered from the original equipment, ensuring a seamless fit without requiring any modifications. This product is meticulously designed and tested in the United States to ensure quality engineering. To confirm that this part is compatible with your exact vehicle, you can input your make, model, and trim level into the garage tool.

Pros

  • Constructed of durable ductile iron to prevent warping and cracking
  • Complete kit includes all necessary components for easy installation
  • Created using reverse engineering from original equipment for a seamless fit
  • Designed and tested in the United States for quality engineering
  • Compatibility with your exact vehicle can be confirmed using the garage tool

8. Chevy/gmc Exhaust Kit – Full Hardware Set

If you're looking for a reliable replacement for your vehicle's stock exhaust manifold, look no further than this precision-engineered exhaust manifold. Made from durable materials that resist warping, cracking, and leaking, this manifold is designed to deliver long-lasting performance. It comes with all the necessary gaskets and downpipe hardware for a complete repair, and is built by an industry leader in aftermarket manifolds, so you can trust it to meet or exceed OEM standards. To ensure a perfect fit, simply input your vehicle's make, model, and trim level into the garage tool.

Don't let a faulty exhaust manifold compromise your vehicle's performance. Upgrade to this high-quality replacement manifold today!

Pros

  • Precision-engineered to match the fit and function of the stock manifold on specified vehicles
  • Durable materials resist warping, cracking, and leaking for long-lasting performance
  • Includes all necessary gaskets and downpipe hardware for a complete repair
  • Built by an industry leader in aftermarket manifolds
  • Easy to ensure a perfect fit with the garage tool

Best Flowing Chevy Exhaust Manifolds FAQs

Can flowing Chevy exhaust manifolds increase horsepower and torque?

Yes, flowing Chevy exhaust manifolds can increase both horsepower and torque. The exhaust manifold is responsible for directing the exhaust gases away from the engine cylinders and into the exhaust system. The more efficiently this is done, the better the engine will perform. By increasing the flow of the exhaust gases, the engine is able to breathe better resulting in improved performance. This is achieved by increasing the diameter of the exhaust manifold, smoothing out any rough edges or bends, and reducing the restriction caused by the factory exhaust manifold. The result is more horsepower and torque, as well as a deeper exhaust note. It is important to note that simply installing a new exhaust manifold will not significantly increase performance unless it is combined with other performance upgrades. So, while upgrading to a flowing Chevy exhaust manifold can increase horsepower and torque, it is just one piece of the puzzle when it comes to improving engine performance.

How do you improve the flow of Chevy exhaust manifolds?

Improving the flow of Chevy exhaust manifolds is essential for enhancing the performance of the engine. The first step to improving the flow is to choose the appropriate exhaust manifold design. A well-designed manifold should have smooth bends and equal length tubes to ensure that the exhaust gases from each cylinder flow uniformly. This helps to reduce backpressure, which is the resistance to the flow of exhaust gases.

Another way to improve the flow of Chevy exhaust manifolds is to use high-performance headers. Headers are an aftermarket exhaust system that replaces the stock exhaust manifold. They are designed to increase exhaust flow by reducing the restrictions in the exhaust system.

It’s also important to ensure that the exhaust manifold is clean and free from any debris or corrosion. A clogged or corroded manifold restricts the flow of exhaust gases, which can affect the performance of the engine. Regular maintenance and cleaning of the manifold can help to prevent this from happening.

In conclusion, improving the flow of Chevy exhaust manifolds requires a combination of proper design, high-performance headers, and regular maintenance. By doing so, you can improve the horsepower and torque of your engine and enhance its overall performance.

What are the benefits of flowing Chevy exhaust manifolds?

Chevy exhaust manifolds play a crucial role in the performance of your vehicle. These components are responsible for directing the exhaust gases out of the engine and into the exhaust system. One of the benefits of flowing Chevy exhaust manifolds is improved engine performance. When the exhaust gases flow smoothly out of the engine, it reduces backpressure and allows the engine to breathe easier, resulting in increased horsepower and torque.

Another benefit of flowing Chevy exhaust manifolds is improved fuel efficiency. When the exhaust gases flow more efficiently, the engine doesn't have to work as hard to expel them, which can help to conserve fuel. Additionally, a more efficient exhaust system can reduce emissions and help your vehicle to comply with environmental regulations.

Finally, flowing Chevy exhaust manifolds can also improve the sound of your vehicle. A smoother exhaust flow can create a deeper, more aggressive exhaust note that can enhance the driving experience. Overall, investing in high-quality, flowing Chevy exhaust manifolds can provide a range of benefits for your vehicle's performance, efficiency, and sound.

What are the best aftermarket Chevy exhaust manifolds for improved flow?

When it comes to upgrading your Chevy's exhaust system, aftermarket exhaust manifolds can make a significant difference in terms of performance gains. The best aftermarket Chevy exhaust manifolds for improved flow are those that are designed with high-quality materials and advanced engineering techniques to maximize exhaust gas flow.

One such popular option is the Hedman Hedders exhaust manifolds. They are known for their efficient design that allows for improved exhaust gas flow, resulting in better engine performance. Another well-regarded option is the BBK Performance exhaust manifolds, which are crafted from high-grade steel and feature a mandrel-bent tubing design for maximum airflow.

Other top brands to consider include Hooker Headers, Dynatech, and JBA Performance Exhaust. Ultimately, the best aftermarket Chevy exhaust manifolds for improved flow will depend on your specific vehicle and performance goals. It's important to do your research and consult with a trusted mechanic or automotive specialist before making any upgrades to your exhaust system.

What is the process for installing flowing Chevy exhaust manifolds?

Installing flowing Chevy exhaust manifolds is a relatively straightforward process, but it requires some preparation and attention to detail. First, you need to remove the old exhaust manifolds and any other components that might interfere with the new ones, such as heat shields or EGR tubes. Make sure the new manifolds are compatible with your vehicle's make, model, and engine type.

Next, you'll need to clean the mating surfaces on the cylinder heads and the exhaust flanges to ensure a proper seal. Apply a thin layer of high-temperature gasket sealant to the exhaust flanges and install the new manifolds, tightening the bolts gradually and evenly to avoid warping or cracking the manifolds. You may also want to install new exhaust gaskets and bolts to ensure a leak-free and secure connection.

Once the manifolds are in place, you can reconnect any other components that were removed, such as the O2 sensors or the catalytic converter. Double-check all connections and tighten any loose bolts or clamps. Finally, start the engine and check for any leaks, unusual noises, or vibrations. If everything looks and sounds good, you're ready to enjoy the improved flow and performance of your Chevy exhaust system.

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