Sylvie Willis
When building a fast car, it is important to consider your fuel system. This is especially true if you are looking to upgrade from low-performance fuel lines for applications requiring more horsepower or repair worn-out fuel lines. For a Subaru STi, the fuel line size is important to consider. The size of the fuel lines will depend on the specific model of the STi, with different sizes available for different model years. For example, the 2002-2014 Subaru WRX STI and the 2007-2014 STI have different fuel line kits available. Additionally, there are different types of fuel lines available, such as braided fuel lines and hard tube quick disconnect EFI adapter fittings. It is also important to consider the cost and availability of fuel lines, as they can vary in price and availability depending on the location and supplier.
Fuel Line Characteristics and Values for a Subaru STI
| Characteristics | Values |
|---|---|
| Hose Inner Diameter | 8mm |
| Hose Outer Diameter | 14mm |
| Hose Finisher Inner Diameter | 12.5mm or 15mm |
| Hose Finisher Colors | Red, Blue, Black, Silver, Chrome |
| Hose Type | Braided |
| Hose Brand | Earls, Pirtek, Goodridge |
| Hose Fittings Brand | Torques UK |
| Hose Clamp Type | Fuel Line Clamps |
| Hose Length | 1-foot lengths |
| Hose Material | Rubber, Nylon |
| Hose Application | Fuel Filter, Fuel Rail, Fuel Pump |
| Vehicle Make and Model | Subaru STI |
| Year Range | 2004-2021 |
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What You'll Learn
- Braided hoses are available from Earls and Pirtek
- Hose finishers are needed to fit over the rubber-lined 8mm ID hose
- The 30R10 line is recommended for in-tank use
- Goodridge fuel lines are known for performance and quality
- The DeatschWerks X2 Series Pump Module Return CPE Plumbing Kit is available for the 2015-2021 Subaru STI
Braided hoses are available from Earls and Pirtek
When it comes to the Subaru STI, there are a few things to consider when choosing the right braided hose kit. Firstly, the size of the hose is important. The standard size for the STI fuel lines is 8mm ID (internal diameter) and 14mm OD (outer diameter), but it's always a good idea to double-check your specific model's requirements. Braided hoses typically come in 1-foot lengths, and you may need multiple pieces depending on your setup.
The IAG Braided Fuel Line and Fitting Kit is one option that fits a wide range of Subaru models, including the 2004-2021 STI. This kit should provide you with everything you need for a proper installation. Another option is the Torque Solution Braided Fuel Line Kit, which fits the 2007-2014 STI models. This kit is designed to work with the Cobb Flex Fuel system and the FPR (fuel pressure regulator).
When purchasing braided hoses from Earls and Pirtek, it's important to consider the fittings and adapters you may need. These suppliers offer a range of options to ensure a secure connection between the hoses and your fuel system. It's worth noting that you may need to source some fittings from specialist suppliers, such as Torques UK, to ensure compatibility with your specific STI model.
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Hose finishers are needed to fit over the rubber-lined 8mm ID hose
To fit over a rubber-lined 8mm ID hose, you will need a 15mm (OD) hose finisher. The smaller 12.5mm hose finisher will not work for this purpose, as it only fits the smaller ID nylon-lined hose.
The 15mm hose finishers are available in a range of colours, including red, blue, black, silver, and chrome. These can be purchased from various automotive retailers and online stores, such as eBay.
It is important to select the correct size and type of hose finisher for your specific application. In this case, the 15mm size is designed to fit over the 8mm ID hose with a rubber lining. The hose finisher provides a secure connection and enhances the overall appearance of the fuel line assembly.
Additionally, when working with fuel lines, it is crucial to prioritize safety. Always follow the manufacturer's recommendations and seek expert advice if needed.
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The 30R10 line is recommended for in-tank use
When choosing a fuel line for your Subaru STI, it is important to consider the specific requirements of your vehicle and the type of fuel system it uses. The 30R10 line is a popular choice for many vehicles, including the Subaru STI, as it meets and exceeds the SAE 30R7 standards and is widely used for fuel systems.
It is important to note that some people believe that the SAE 30R9 fuel line can be used for in-tank use, but this is not recommended. The SAE 30R9 is rated for fuel injection use outside the tank and will not withstand continuous submersion. The 30R10 line, on the other hand, is specifically designed for submersible use and will provide a more durable and reliable solution for your Subaru STI.
When installing the 30R10 line, it is recommended to use good fuel line clamps and avoid worm gear clamps. The fuel line clamps are a little more expensive, but they are worth the extra cost considering the difficulty of removing the fuel pump assembly. By choosing the 30R10 line and following the proper installation guidelines, you can ensure the optimal performance and longevity of your Subaru STI's fuel system.
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Goodridge fuel lines are known for performance and quality
Goodridge is the world's leading manufacturer of performance fluid transfer systems. The company operates in several sectors, including automotive and motorsport, and is known for its unique combination of design, innovation, reliability, and outstanding service. Goodridge manufactures and distributes its products in the UK, USA, Mexico, Japan, and Europe, and has a global workforce of over 500 people.
Goodridge's performance and quality are evident in its fuel lines, which are designed to meet the demands of various vehicles, including the Subaru STI. When it comes to fuel lines for the Subaru STI, factors such as length, material, and compatibility are crucial. The length of the fuel lines depends on the specific model and year of the Subaru STI, as well as any modifications made to the engine and fuel system.
Braided fuel lines, for example, are a popular choice for the Subaru STI, offering both performance and aesthetic benefits. Goodridge's braided fuel lines are known for their durability and corrosion resistance, ensuring reliable fuel delivery. The company's fuel lines are also designed to withstand the stresses of motorsport and high-performance applications, providing consistent performance even under extreme conditions.
In addition to performance, Goodridge fuel lines prioritize safety and reliability. The lines are manufactured with high-quality materials and precision engineering to prevent leaks and ensure proper fuel flow. Goodridge's attention to quality extends beyond the fuel lines themselves, as they also offer a range of fuel line fittings, adapters, and clamps to ensure secure and leak-free connections. This comprehensive approach to fuel system components contributes to the overall performance and reliability of the vehicle.
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The DeatschWerks X2 Series Pump Module Return CPE Plumbing Kit is available for the 2015-2021 Subaru STI
The DeatschWerks X2 Series Pump Module Return CPE Plumbing Kit is a fuel pump installation kit designed for the 2008-2014 Subaru WRX/STI. The kit includes an -8AN feed and a -6AN return, as well as larger fuel lines that allow for unobstructed fuel volume and flow straight to the fuel rails and injectors. This makes it ideal for those building high-horsepower and high-boosted applications.
The DeatschWerks X2 Series Pump Module is a popular choice for Subaru enthusiasts looking to upgrade their fuel system. It is designed to work in conjunction with the DeatschWerks X2 Series Pump Module, which is sold separately. The plumbing kit includes all the necessary components to complete the fuel pump installation, ensuring a seamless and efficient fuel flow to the engine.
One of the key benefits of this plumbing kit is its ability to provide unobstructed fuel volume and flow. The larger fuel lines ensure that fuel can reach the injectors without any restrictions, resulting in improved engine performance and responsiveness. This is especially beneficial for those who are aiming for high-horsepower and high-boosted applications.
The kit is compatible with the 2008-2014 models of the Subaru WRX and STI, offering a straightforward upgrade solution for owners of these vehicles. It is worth noting that the manufacturer's advertised price for this kit is not publicly available, and interested buyers might need to inquire directly with the seller to obtain the pricing information.
Overall, the DeatschWerks X2 Series Pump Module Return CPE Plumbing Kit is a valuable option for those looking to enhance their Subaru WRX or STI's fuel system. With its larger fuel lines and seamless integration, this kit delivers the performance and efficiency sought by enthusiasts and tuners alike.
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Frequently asked questions
The length of the fuel lines in a Subaru STI varies depending on the model year. For example, the fuel line kits for the 2002-2014 Subaru WRX STI are different lengths than the fuel line kits for the 2007-2021 Subaru WRX STI.
The standard fuel line sizes for a Subaru STI are 14mm OD (outer diameter) and 8mm ID (inner diameter) hoses.
There are several companies that offer fuel lines and fittings specifically for Subaru STI vehicles, including Goodridge, Earls, Pirtek, and Torques UK. You can also find fuel lines and fittings from Subaru-specific retailers such as SubiSpeed and Rallysport Direct.
The best type of fuel line for your Subaru STI will depend on your specific needs and preferences. Braided fuel lines, such as those offered by Goodridge and Earls, are popular among Subaru enthusiasts for their performance and quality. Other options include submersible fuel lines or custom motorsport lines. It's important to consider factors such as fuel flow, toughness, and dependability when choosing the right fuel line for your vehicle.
