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The Subaru Forester has gained a reputation for its versatility and capability, particularly when equipped with a turbocharged engine. For enthusiasts looking to enhance performance, aftermarket headers and downpipes are two popular modifications. This article will compare these components to help you make an informed decision about which upgrade might best suit your performance goals.
Understanding Headers and Downpipes
Before diving into the comparison, it’s essential to understand what headers and downpipes are and how they function within the exhaust system of the Forester turbo.
- Headers: These are the components that connect the engine’s exhaust ports to the exhaust system. They are designed to improve exhaust flow and reduce back pressure.
- Downpipes: These are the sections of the exhaust system that connect the turbocharger to the rest of the exhaust system. A high-performance downpipe can significantly enhance turbo efficiency.
Performance Gains from Aftermarket Headers
Aftermarket headers can provide several performance benefits for the Subaru Forester turbo. Here are some of the key advantages:
- Increased Horsepower: Headers can improve the engine’s horsepower by allowing exhaust gases to exit more freely.
- Enhanced Torque: Better exhaust flow can lead to increased torque, especially in the mid-range RPMs.
- Improved Sound: Many enthusiasts enjoy the more aggressive exhaust note that aftermarket headers produce.
- Weight Reduction: Some aftermarket headers are made from lighter materials, reducing overall weight.
Types of Aftermarket Headers
There are several types of aftermarket headers available for the Forester turbo:
- Equal Length Headers: These headers provide a consistent length for each exhaust runner, promoting smoother exhaust flow.
- Unequal Length Headers: These tend to produce a more aggressive sound and can enhance torque but may not provide the same peak horsepower gains.
Performance Gains from Aftermarket Downpipes
Aftermarket downpipes are also crucial for turbo performance. Here’s what they can offer:
- Reduced Turbo Lag: A high-flow downpipe can minimize the turbo lag, allowing for quicker spool times.
- Higher Boost Levels: With less restriction, downpipes can support higher boost levels, leading to increased power.
- Better Exhaust Flow: Improved design and larger diameter can significantly enhance exhaust flow.
- Potential for Tuning: Upgrading the downpipe often requires tuning to maximize performance gains.
Types of Aftermarket Downpipes
When selecting a downpipe, consider the following types:
- Catted Downpipes: These include a catalytic converter, making them more street-legal and emissions compliant.
- Catless Downpipes: These offer maximum flow and performance but may not be street legal in all areas due to emissions regulations.
Comparing Headers and Downpipes
While both headers and downpipes improve performance, they serve different purposes. Here’s how they compare:
- Installation Complexity: Headers can be more challenging to install due to their location and the need to remove the intake manifold in some cases. Downpipes are generally easier to replace.
- Cost: Headers are often more expensive than downpipes, but both can vary widely in price depending on the brand and material.
- Performance Impact: Headers tend to improve horsepower and torque across a broader RPM range, while downpipes primarily enhance turbo response and spool time.
- Sound: Headers can change the exhaust note more significantly than downpipes.
Which Upgrade is Right for You?
Choosing between aftermarket headers and downpipes depends on your performance goals and budget. Here are some considerations:
- Performance Goals: If you’re looking for maximum horsepower and torque, you might consider both upgrades.
- Budget: If you’re on a tighter budget, start with a downpipe, as it often provides significant gains for less money.
- Emissions Regulations: Consider your local laws regarding emissions when choosing between catted and catless options.
- Sound Preference: If you prefer a louder exhaust note, headers may be the better choice.
Conclusion
Both aftermarket headers and downpipes can significantly enhance the performance of your Subaru Forester turbo. Understanding the differences between these components and how they impact performance can help you make an informed decision. Whether you choose to upgrade one or both, you’ll experience improved power and responsiveness, making your Forester even more enjoyable to drive.