Upgrading your Mitsubishi EVO exhaust manifold is a game-changer! If you're looking to boost your car's performance, improve its sound, and maybe even make it look a little cooler under the hood, you've come to the right place. We're diving deep into everything you need to know about EVO exhaust manifolds. Let's get started, shall we?

Why Upgrade Your EVO Exhaust Manifold?

So, why should you even bother upgrading your exhaust manifold? Great question! The stock exhaust manifold on the Mitsubishi EVO, while functional, is often a bottleneck in the exhaust system. It's designed for mass production and cost-effectiveness, not necessarily for peak performance. Upgrading to an aftermarket exhaust manifold can bring several benefits:

• Increased Horsepower and Torque: An aftermarket manifold is typically designed with larger diameter runners and smoother bends, which allows exhaust gases to flow more freely. This reduces backpressure and allows the engine to breathe easier, resulting in more horsepower and torque. Who doesn’t want more power, right?
• Improved Turbo Spool: A more efficient exhaust flow can help your turbocharger spool up faster. This means less turbo lag and quicker acceleration. Imagine hitting the gas and feeling that instant boost – that’s what we’re talking about!
• Enhanced Exhaust Note: Depending on the design and materials, an aftermarket exhaust manifold can give your EVO a more aggressive and sporty exhaust note. It’s all about that sweet, sweet sound, guys.
• Better Heat Dissipation: Some aftermarket manifolds are made from materials that dissipate heat more effectively than the stock manifold. This can help reduce under-hood temperatures and improve overall engine performance and reliability. Cooler is always better!
• Aesthetic Appeal: Let's be honest, some aftermarket exhaust manifolds just look plain awesome. If you're into showing off your engine bay, an upgraded manifold can add a nice touch of visual flair. Bling, bling!

Types of EVO Exhaust Manifolds

Alright, now that you know why you should upgrade, let's talk about the different types of exhaust manifolds available for your Mitsubishi EVO. There are a few key designs to consider:

• Cast Manifolds: Cast manifolds are typically made from cast iron or cast stainless steel. They are durable and relatively inexpensive, making them a popular choice for many enthusiasts. However, they are often heavier and may not flow as well as tubular manifolds.
• Tubular Manifolds: Tubular manifolds are constructed from individual pieces of tubing that are welded together. This allows for more precise design and smoother bends, which can improve exhaust flow. Tubular manifolds are generally lighter than cast manifolds but can be more expensive.
• Equal Length Manifolds: Equal length manifolds are designed so that each runner (the tube that carries exhaust gas from each cylinder) is the same length. This helps ensure that exhaust pulses arrive at the turbocharger at equal intervals, which can improve turbo spool and overall performance. These are often considered the best option for maximizing power.
• Short Runner Manifolds: Short runner manifolds are designed with shorter runners to improve top-end power. These are often used in racing applications where high RPM performance is prioritized.
• Long Runner Manifolds: Long runner manifolds are designed with longer runners to improve low-end torque. These are often used in street applications where responsive low-RPM performance is desired.

Materials Matter: Choosing the Right Material

The material your exhaust manifold is made from plays a significant role in its performance, durability, and cost. Here’s a rundown of the most common materials:

• Cast Iron: Cast iron manifolds are the most affordable option. They are durable and retain heat well, which can help improve turbo spool. However, they are heavy and don't flow as well as other materials. Think of them as the reliable workhorses of the exhaust manifold world.
• Stainless Steel: Stainless steel manifolds offer a good balance of performance, durability, and cost. They flow better than cast iron and are resistant to rust and corrosion. Stainless steel is a popular choice for many enthusiasts.
• Inconel: Inconel is a high-nickel alloy that offers exceptional heat resistance and durability. It is often used in high-performance and racing applications where extreme temperatures are common. Inconel manifolds are the most expensive option, but they offer the best performance and longevity. If you're serious about performance and have the budget, Inconel is the way to go.

Key Considerations When Choosing an Exhaust Manifold

Before you pull the trigger on a new exhaust manifold, there are a few key considerations to keep in mind. You want to make sure you're getting the right part for your needs and that it will work properly with your EVO.

• Turbocharger Compatibility: Make sure the exhaust manifold is compatible with your turbocharger. Some manifolds are designed for specific turbochargers or turbocharger flanges (the connection point between the turbo and manifold). If you're running an aftermarket turbo, double-check that the manifold will bolt up correctly. Mismatched parts are a headache you definitely want to avoid.
• EWG vs. IWG: Determine whether you need an exhaust manifold for an external wastegate (EWG) or an internal wastegate (IWG) turbocharger. An EWG manifold will have a provision for an external wastegate, which is used to control boost pressure more precisely. An IWG manifold is designed for turbochargers with an internal wastegate. Know your setup!
• Runner Diameter and Length: Consider the runner diameter and length of the exhaust manifold. Larger diameter runners will generally flow more air, which can improve top-end power. Longer runners can improve low-end torque. Choose a manifold with runner dimensions that match your desired performance characteristics.
• Fitment and Clearance: Ensure that the exhaust manifold will fit properly in your engine bay and that it clears all other components. Some aftermarket manifolds may require modifications to fit correctly. Check for any potential fitment issues before you buy.
• Quality and Construction: Look for an exhaust manifold that is made from high-quality materials and has solid construction. Check for smooth welds and sturdy flanges. A well-made manifold will last longer and perform better. Don't skimp on quality!

Installation Tips and Tricks

Installing an exhaust manifold can be a bit of a challenge, but with the right tools and a little patience, you can do it yourself. Here are some tips and tricks to help you through the process:

• Gather Your Tools: Make sure you have all the necessary tools before you start. This includes sockets, wrenches, extensions, a torque wrench, and penetrating oil. Having the right tools will make the job much easier.
• Penetrating Oil is Your Friend: Spray all the exhaust manifold bolts with penetrating oil a day or two before you plan to remove them. This will help loosen any rust and make the bolts easier to remove. Trust us, this step can save you a lot of frustration.
• Take Your Time: Don't rush the installation process. Take your time and be careful not to damage any components. Rushing can lead to mistakes and potential problems down the road.
• Use New Gaskets: Always use new gaskets when installing an exhaust manifold. Old gaskets can leak and cause performance issues. New gaskets will ensure a proper seal.
• Torque to Spec: Torque all the exhaust manifold bolts to the manufacturer's specifications. This will ensure that the manifold is properly secured and that the gaskets are properly sealed. A torque wrench is essential for this step.
• Heat Wrap or Ceramic Coating: Consider heat wrapping or ceramic coating your exhaust manifold. This can help reduce under-hood temperatures and improve performance. Heat wrap and ceramic coating can also protect the manifold from corrosion.

Top Brands for EVO Exhaust Manifolds

When it comes to EVO exhaust manifolds, there are several reputable brands to choose from. Here are a few of the top names in the business:

• Full-Race Motorsports: Full-Race is known for their high-quality, performance-oriented exhaust manifolds. They offer a range of manifolds for different turbocharger setups and performance goals.
• Shearer Fabrications: Shearer Fabrications specializes in custom exhaust manifolds and other performance parts. They are known for their attention to detail and high-quality craftsmanship.
• MAPerformance: MAPerformance offers a variety of exhaust manifolds for the EVO, including both cast and tubular designs. They are a popular choice for enthusiasts looking for a balance of performance and value.
• ETS (Extreme Turbo Systems): ETS is a well-known brand in the EVO community, offering a range of performance parts, including exhaust manifolds. They are known for their quality and performance.

Maintaining Your Upgraded Exhaust Manifold

Once you've installed your new exhaust manifold, it's important to maintain it properly to ensure it lasts for years to come. Here are a few tips:

• Regular Inspections: Regularly inspect your exhaust manifold for any signs of cracks, leaks, or corrosion. Catching problems early can prevent more serious damage.
• Check Bolts: Periodically check the exhaust manifold bolts to ensure they are properly torqued. Loose bolts can cause leaks and performance issues.
• Avoid Extreme Heat: Avoid subjecting your exhaust manifold to extreme heat whenever possible. Excessive heat can cause the manifold to warp or crack.
• Clean Regularly: Clean your exhaust manifold regularly to remove any dirt, oil, or debris. This can help prevent corrosion and keep it looking its best.

Conclusion

So there you have it, guys! Everything you need to know about upgrading your Mitsubishi EVO exhaust manifold. From understanding the benefits to choosing the right type and material, you're now armed with the knowledge to make an informed decision. Upgrading your exhaust manifold is a fantastic way to improve your EVO's performance, sound, and overall driving experience. Happy tuning!