Sti header

Types of STI Headers

• Top Mount STI Headers:

  Top mount sti header are positioned above the engine, making them suitable for vehicles with engine layouts that allow this configuration. This header style is often seen in Subaru WRX models. Top mount headers are known for their ability to reduce turbo lag and improve throttle response, making them ideal for performance-oriented driving.

• Equal-Length Headers:

  Equal-length headers are designed to ensure that each exhaust pipe leading away from the engine's cylinders is the same length. This design minimizes exhaust gas turbulence, reduces back pressure, and optimizes the scavenging effect. As a result, equal-length headers improve engine efficiency, increase horsepower, and provide a smoother exhaust note. These headers are commonly used in racing and high-performance applications where maximizing engine output is critical.

• Unequal Length Headers:

  Unequal-length headers feature exhaust pipes of varying lengths. This design creates a specific firing order and exhaust pulse pattern that can enhance low-end torque. Unequal-length headers are often found in factory-built performance vehicles and are favored by enthusiasts who prioritize strong low-end power delivery. While unequal-length headers may not provide the same level of peak horsepower gains as equal-length headers, they excel in applications requiring robust low-end performance.

• Stainless Steel Headers:

  Stainless steel headers are constructed from high-grade stainless steel alloys. This material choice provides excellent corrosion resistance, making these headers suitable for various driving conditions and environments. Stainless steel headers offer durability and longevity, ensuring they can withstand the high temperatures and stresses of exhaust gas flow. Additionally, the smooth internal surfaces of stainless steel headers minimize exhaust turbulence, contributing to improved engine performance and efficiency.

• Long Tube Headers:

  Long tube headers are characterized by their extended primary pipes that lead further down the vehicle's chassis. This design maximizes exhaust scavenging, resulting in significant improvements in mid-range and high-end horsepower. Long tube headers are often used in performance applications where maximizing engine output is a priority. However, due to their extended length, long tube headers may require modifications to the vehicle's exhaust system.

• Shorty Headers:

  Shorty headers have shorter primary pipes that exit the engine bay relatively quickly. This design leads to increased back pressure compared to long tube headers. Shorty headers are typically easier to install and may not require significant exhaust system modifications. As a result, shorty headers are often chosen for applications prioritizing cost-effectiveness and improved engine response without the need for extensive exhaust system changes.

Specifications and Maintenance of STI Headers

• Material

  STI headers come in three main types, and the material used in each type is different. There are headers made from stainless steel, cast iron, and carbon steel. Each type has its own advantages. For instance, stainless steel headers have great resistance to corrosion and rusting. They are also very durable and strong.

• Type of Coating

  Some headers have a special type of coating on the surface. This is done to improve the appearance of the header and also offer protection. One of the common types of coating is the ceramic coating. It is done to protect the headers from high temperatures and corrosion.

• Size

  STI headers come in different sizes. The size of a header is determined by the size of the exhaust pipes. The exhaust pipes are measured in inches. Most headers have pipe sizes that range from 1.5 to 2.5 inches in diameter. This means the pipes will measure 1.5 to 2.5 inches across in round.

• Type

  There are different types of STI headers. Each type is designed to suit a particular model of Subaru vehicle. The most common types are unequal length and equal length headers. The headers are also designed for specific purposes. For instance, some headers are designed for racing.

• Fitment

  Different models of Subaru vehicles have headers that are designed to fit perfectly in the exhaust system. This is important because it helps eliminate any potential issues. For instance, it helps prevent any leaks or cracks that may occur in the exhaust system due to improper fitment.

Maintaining STI headers is important to keep them in good condition and functioning well. Here are some maintenance practices.

• Regular Inspection: It is important to check the headers regularly. This helps catch any potential issues early before they become serious problems. During the inspection, look out for any signs of wear, rust, or damage.
• Cleaning: Dirt and debris should be removed from the headers regularly during cleaning. This prevents the buildup of grime, which can affect the performance and appearance of the headers. A soft brush or cloth can be used to wipe the surface of the headers.
• Tightening: Over time, the bolts and nuts that attach the headers to the exhaust system can become loose. This can lead to leaks and cracks in the exhaust system. Make sure that all the bolts and nuts are securely fastened to prevent any potential issues.
• Replacements: If there are any damaged or worn-out parts found during inspection, make sure that they are replaced as soon as possible. This will help maintain the performance of the headers and also prevent damage to other parts of the exhaust system.

How to choose sti headers

Choosing the right STi headers for a business can be a challenging task. Here are some ideas to consider:

• Understand the market: Before selecting an STi header, it is important to understand the target market. This includes understanding the demographic, geographic, and psychographic characteristics of the target market. For instance, the business could target a younger audience that is interested in sports and high-performance cars. In this case, the STi headers selected should be sporty and high-performance oriented.
• Branding: Choose a reputable STi header brand that is known for quality and durability. This will help the business build a reputation for quality products. The business can also customize the STi headers to fit its brand. This includes adding the business logo and color to the headers.
• Performance: Select STi headers that offer high performance. This includes selecting headers that offer high horsepower and torque gains. The headers should also offer a better exhaust flow to improve engine performance.
• Quality: Select STi headers that are of high quality. This includes selecting headers that are made of high-quality materials such as stainless steel. The headers should also be well-constructed to ensure durability.
• Price: Select STi headers that are affordable to the target market. This does not mean that the business should compromise on quality. The headers selected should offer value for money.
• Easy installation: Select STi headers that are easy to install. This will save time and reduce costs associated with header installation.
• Compatibility: Choose STi headers that are compatible with the target market's car models. This will ensure that the headers fit well and offer optimal performance.

How to DIY and Replace STI Header

Many Subaru headers are available for DIY replacement. Nonetheless, the process is a bit complicated and requires mechanical knowledge to execute it successfully. Below is a step-by-step guide on how to replace an STI header:

• 1. Prepare the Work Area: Find a suitable and spacious working area. Ensure the vehicle has enough room to lift and work under it. Gather all the necessary tools, including jacks, jack stands, wrenches, and sockets.
• 2. Disconnect the Battery: For safety reasons, disconnect the battery before starting any work on the exhaust system. This prevents any electrical issues or short circuits.
• 3. Lift the Vehicle: Use a jack to lift the vehicle and place it on jack stands. This provides enough clearance to work under the car.
• 4. Remove Under-Engine Cover: Some vehicles have an under-engine cover that may obstruct access to the exhaust headers. Remove this cover to gain better access.
• 5. Remove Air Intake: Depending on the vehicle's design, it may be necessary to remove the air intake system to create more room for working on the headers. Take note of how the air intake is connected for reassembly.
• 6. Drain Coolant (if applicable): In some vehicles, the exhaust headers may be connected to the engine's cooling system. If this is the case, drain the coolant before proceeding to avoid any spills or leaks.
• 7. Disconnect Exhaust Components: Begin disconnecting the exhaust components connected to the headers. This may include exhaust pipes, gaskets, and bolts. Use penetrating oil to loosen any rusted or seized bolts.
• 8. Remove Engine Heat Shield: Some headers may be covered by an engine heat shield. Remove the heat shield to gain direct access to the headers.
• 9. Unbolt and Remove Old Headers: Use the appropriate wrenches and sockets to unbolt the old headers from the engine. Be cautious of any sharp edges or hot surfaces. Carefully remove the old headers from the vehicle.
• 10. Install New Headers: Position the new headers in place and carefully guide them into the engine bay. Be cautious not to damage any surrounding components. Once in position, secure the new headers with the provided bolts and gaskets. Tighten all fasteners to the manufacturer's specified torque using a torque wrench.
• 11. Reassemble Exhaust Components: Reconnect the exhaust pipes, heat shields, and any other components that were removed. Ensure all gaskets are properly seated to prevent exhaust leaks.
• 12. Reconnect Air Intake and Cooling System (if applicable): Reconnect the air intake system and, if necessary, the cooling system. Follow the manufacturer's instructions for proper connections and routing.
• 13. Reconnect the Battery: Reconnect the battery terminals, ensuring a secure connection.
• 14. Start the Engine: Start the engine and listen for any unusual noises or exhaust leaks. Check the header connections and surrounding components for any signs of leaks or issues.
• 15. Lower the Vehicle: Once everything is reassembled and checked, remove the jack stands and lower the vehicle from the jack.
• 16. Take a Test Drive: Take the vehicle for a test drive to ensure everything is functioning correctly. Pay attention to the headers' performance and sound.

Q&A

Q: Are STI headers worth the money?

A: The worth of STI headers depends on various factors. They are generally more expensive than standard headers because they are made of high-quality materials and designed to improve the vehicle's performance. If the user is looking to improve the performance of their vehicle, they are worth the money.

Q: Do STI headers fit all vehicles?

A: No, STI headers are not made to fit all vehicles. They are designed to fit specific makes and models. It is important to verify that the headers will fit the vehicle before purchasing them.

Q: How long do STI headers last?

A: The longevity of STI headers can vary depending on several factors, such as the type of material they are made from, the level of maintenance, and the driving conditions. Generally, they are designed to be durable and can last a long time with proper maintenance.

Q: Do STI headers require maintenance?

A: Yes, STI headers require some level of maintenance to ensure they function properly and last a long time. Users should routinely check them for any signs of damage or wear and address any issues promptly. Additionally, keeping them clean is important, especially in areas with high levels of dirt or debris.