
Installing a fuel return line in your car can increase the amount of fuel that reaches the injectors. This is done by sending excess fuel back through the return line. The fuel return line kit is compatible with stock engines and larger injectors. The kit includes fittings, hoses, fuel pressure gauges, regulator brackets, nuts, bolts, and hose clamps. It is important to understand how a fuel pressure regulator works before installation.
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What You'll Learn
- The fuel return line kit increases fuel volume to the injectors
- The fuel return line kit is compatible with stock engines
- The fuel return line kit is the only aftermarket setup that regulates fuel pressure before the fuel rail
- The fuel return line kit comes with all necessary fittings, hose, fuel pressure gauge, regulator bracket, nuts, bolts, and hose clamps
- The fuel return line kit is compatible with ethanol fuels such as E98 and E85

The fuel return line kit increases fuel volume to the injectors
Return line kits are also compatible with stock fuel rails, meaning you don't need a custom fuel rail. This is because the regulator can be connected to the stock fuel feed line. The fuel return line kit is also compatible with ethanol fuels such as E98 and E85.
For those with a Dodge SRT-4, the Walbro 255lph pump works well with the stock fuel rail, up to mid-high 400 horsepower. Above this, a more specialized fuel pump setup is required.
The fuel return line kit can be combined with larger injectors to accomplish the goal of additional fueling for a larger turbo. However, some users have reported that the stock injectors work well with the return line kit, even when increasing horsepower.
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The fuel return line kit is compatible with stock engines
The SRT-4 Neon AGP Fuel Return Line Kit is a popular choice for those seeking to install a fuel return line on their stock engines. This kit is specifically designed for compatibility with stock engines, providing a straightforward installation process.
One of the key advantages of this kit is its ability to regulate fuel pressure before the fuel rail. This means that it can work with any stock fuel rail, eliminating the need for a custom fuel rail. The kit includes a 1:1 adjustable fuel pressure regulator from Aeromotive, allowing you to connect it seamlessly to your stock fuel feed line.
The kit also comes with custom CNC-machined billet aluminum quick-disconnect fittings, ensuring a secure and proper connection to your stock engine. Additionally, it provides a braided stainless steel hose that you can run back to the filler line at the tank, ensuring a durable and efficient fuel return system.
Another benefit of this fuel return line kit is its compatibility with various fuel types. It can be used with gasoline, as well as ethanol fuels such as E98 and E85. This versatility makes it a suitable option for those looking to upgrade their fuel system without switching to specialized fuels.
Overall, the SRT-4 Neon AGP Fuel Return Line Kit offers a comprehensive solution for those seeking to install a fuel return line on their stock engines. With its compatibility, ease of installation, and ability to regulate fuel pressure, it is a popular choice for stock engine upgrades.
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The fuel return line kit is the only aftermarket setup that regulates fuel pressure before the fuel rail
The SRT-4 Neon AGP Fuel Return Line Kit is a unique aftermarket solution for fuel pressure regulation. Unlike conventional fuel return setups, this kit regulates fuel pressure before the fuel enters the rail, offering several advantages.
Firstly, this kit's design eliminates the need for a custom fuel rail. It is compatible with any stock fuel rail, including those with a Schrader valve. This versatility simplifies the installation process and reduces the need for additional modifications.
The core component of this kit is the Aeromotive 1:1 adjustable fuel pressure regulator. This regulator connects to the stock fuel feed line using custom CNC-machined billet aluminium quick-disconnect fittings. This regulator is designed to maintain optimal fuel pressure throughout the system, from the fuel pump to the injectors. By adjusting the pressure before it reaches the rail, the regulator ensures that the injectors receive the correct amount of fuel, preventing potential damage from incorrect pressure.
To complete the installation, the kit provides a braided stainless steel hose that connects the regulator to the filler line at the tank. This hose is designed to withstand the high-pressure fuel flow and ensure a secure connection. Additionally, the kit includes all the necessary fittings, hose clamps, a fuel pressure gauge, regulator bracket, nuts, bolts, and a billet aluminium sleeve to block off the factory regulator in the stock fuel filter.
The SRT-4 Neon AGP Fuel Return Line Kit offers a comprehensive solution for fuel pressure regulation, providing increased flexibility and performance while simplifying the fuel delivery system.
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The fuel return line kit comes with all necessary fittings, hose, fuel pressure gauge, regulator bracket, nuts, bolts, and hose clamps
The fuel return line kit is a comprehensive package that enables you to install a fuel return setup that regulates fuel pressure before the fuel reaches the rail. This kit is designed to be compatible with any stock fuel rail, removing the need for a custom setup. It includes all the necessary components for a complete installation, ensuring a straightforward process.
The fittings included in the kit are made from high-quality materials. They are crafted from CNC-machined billet aluminum, ensuring precision and durability. These fittings are designed to seamlessly connect the regulator to your stock fuel feed line. The kit also includes a braided stainless steel hose, which provides a reliable and durable connection back to the filler line at the tank.
Additionally, the fuel return line kit comes with a fuel pressure gauge, enabling you to monitor the fuel pressure in your system. This gauge provides valuable data to ensure optimal performance and make any necessary adjustments. The regulator bracket is also included, allowing for a secure installation of the fuel pressure regulator.
Furthermore, the kit includes essential hardware such as nuts, bolts, and hose clamps. These components ensure that you have all the necessary items to securely fasten the fuel return line in place. With these items, you can be confident that your installation will be secure and reliable. This comprehensive kit simplifies the process of installing a fuel return line, ensuring that you have all the required parts for a successful project.
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The fuel return line kit is compatible with ethanol fuels such as E98 and E85
The fuel return line kit is designed to regulate fuel pressure before the fuel rail, allowing for increased fuel volume to reach the injectors. This setup is particularly beneficial when using ethanol fuels such as E98 and E85, which have higher fuel demands compared to regular gasoline. By regulating pressure before the fuel rail, the kit ensures that excess fuel can be returned using the return line, optimizing fuel delivery to the injectors.
It's important to note that ethanol, being corn-based, is more readily available in certain regions, like the Midwest United States. Additionally, due to its lower heating value compared to gasoline, it may be harder to start engines in cold climates. However, with proper adjustments, such as adding more ethanol in the summer and less in the winter, E85 can be used flexibly to achieve optimal engine performance.
When considering the use of ethanol fuels with the fuel return line kit, it is essential to ensure compatibility with your vehicle and fuel system. While the kit is designed to work with stock engines, it is always advisable to consult with a professional or refer to the vehicle's manual to ensure safe and proper usage. Additionally, storing ethanol fuels, such as E98, in tightly sealed containers and maintaining stable temperatures can help prolong their shelf life.
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Frequently asked questions
A fuel return line kit regulates the fuel pressure before the fuel rail. This means that you do not need a custom fuel rail and it will work with any stock fuel rail.
A fuel return line kit can increase the amount of fuel that reaches the injectors. This is because the fuel is no longer regulated at the pump and can flow freely to the injectors.
You will need a fuel pressure regulator, nylon fuel line quick connectors, a high-pressure fuel injection hose, and fuel injection clamps. You will also need a vacuum line to run from the intake manifold to the fuel pump.
The Moroso EFI Fuel Return Line Kit and the SRT-4 Neon AGP Fuel Return Line Kit are compatible with the SRT-4.
In a return system, the fuel pressure is regulated by a regulator, allowing fuel to flow freely to the injectors and return back. In a returnless system, the pressure is regulated at the pump and fuel does not flow freely to the injectors and return back.










































