The COBB Tuning Short Ram Intake (SF Intake) is a performance-enhancing component designed for Volkswagen and Subaru models, offering improved airflow, enhanced engine response, and a more aggressive induction sound. This guide provides step-by-step installation instructions based on official documentation and technical specifications from COBB Tuning and its authorized partners. The instructions cover both Volkswagen and Subaru models, including specific details for the GTI, Golf R, WRX, STI, and MAZDASPEED 3.
The installation process is designed to be straightforward, requiring only basic hand tools and minimal mechanical experience. However, it is important to note that the SF Intake requires tuning to ensure proper operation and safety, especially for 2008 and newer models. COBB Tuning offers Off-The-Shelf (OTS) tuning maps that can be applied via the Accessport, streamlining the process for users.
This guide is intended for U.S.-based users and follows the manufacturer's instructions and specifications as outlined in the official documentation. It is organized to provide a clear understanding of the installation process, the components involved, and the necessary tools. Where multiple sources provide similar information, the most authoritative or detailed version has been selected.
Overview of the COBB SF Intake System
The COBB SF Intake is a high-performance air intake system designed to replace the factory airbox in several Volkswagen and Subaru models. It is engineered to increase airflow to the engine, reduce intake noise, and improve overall engine efficiency. The system is constructed from a one-piece high-temperature plastic composite, which minimizes heat transfer and reduces the risk of heat soak. This material also contributes to the system's lightweight design, making it a practical upgrade for performance-oriented drivers.
A key feature of the SF Intake is the use of a CFD (Computational Fluid Dynamics)-engineered velocity stack and airflow straightener grid. These components work together to ensure smooth and consistent airflow to the Mass Air Flow (MAF) sensor, reducing turbulence and improving the accuracy of sensor readings. The intake also includes a custom conical air filter element, which is pre-oiled and ready for installation. This filter is designed to capture contaminants while allowing maximum airflow.
For Volkswagen models, the SF Intake is specifically designed for the MK7 GTI and Golf R. The installation process involves removing the factory intake system and replacing it with the COBB kit. For Subaru models, the SF Intake is compatible with the 08–19 STI, 08–14 WRX, and 09–13 FXT. The installation is similarly straightforward, with the system designed to bolt into place without requiring cutting or permanent modifications.
It is important to note that the SF Intake requires tuning for proper operation, particularly for 2008 and newer models. COBB Tuning offers OTS maps that can be used with the Accessport, allowing users to apply the necessary tuning without the need for custom calibration.
Tools and Components Required for Installation
Before beginning the installation process, it is essential to gather all the necessary tools and components. The following list outlines the tools required for the installation, as well as a breakdown of the parts included in the COBB SF Intake kit.
Tools
- 3/8" Ratchet
- 3/8" 7mm Socket
- 3/8" 8mm Socket
- 3/8" 10mm Socket
- T20 Torx Screwdriver
- Hose Clamp Pliers or traditional pliers
- 6mm Hex Key
- 2.5mm Hex Key
These tools are required for removing the factory intake components and installing the new intake system. A 3/8" ratchet and sockets are used for removing the bolts securing the factory airbox, while the T20 Torx screwdriver is used for removing the engine cover. The hose clamp pliers or traditional pliers are used for loosening and tightening the worm clamps that secure the intake tube. The 6mm and 2.5mm hex keys are used for tightening the screws that secure the intake body and lid.
Parts Included in the Kit
The COBB SF Intake kit includes all the necessary components for installation, ensuring a complete and straightforward upgrade. The following parts are included:
- Airbox Body
- Airbox Lid
- Snorkel Body
- Snorkel Lid
- Silicone Intake Tube
- Velocity Stack
- Velocity Stack Bracket
- Air Filter
- Air Pump Plug
- Air Pump Adapter
- 1/4" Fitting
- 11x SS Button Head M4 x 10mm Screw
- 11x 4mm Black Nylon Washer
- 5x Flange Bolt M6 x 12mm
- 2x SS Socket Head M6 x 12mm Screw
- 2x M6 Lock Washer
- 2x M6 Flat Washer
- #048 Worm Clamp
- #044 Worm Clamp
- 12" Edge Trim
- 16" Edge Trim (Low Profile)
These components are designed to replace the factory intake system and provide a secure and efficient airflow solution. The silicone intake tube ensures durability and flexibility, while the velocity stack and airflow straightener grid work together to optimize airflow. The air filter is pre-oiled and ready for installation, ensuring immediate performance benefits.
Installation Steps for Volkswagen Models
The installation process for Volkswagen models, such as the GTI and Golf R, is designed to be straightforward and can be completed with basic hand tools. The following steps outline the process for removing the factory intake system and installing the COBB SF Intake.
Step 1: Remove the Engine Cover
Before removing the factory intake system, it is recommended to remove the engine cover. This provides better access to the intake components and makes the installation process easier. The engine cover is held in place by grommets, so it can be removed by simply pulling it off.
Step 2: Remove the Factory Intake System
To remove the factory intake system, begin by disconnecting the airbox and intake tube. The airbox is held in place by grommets, so it can be removed by pulling it out of the car. Once the airbox is removed, the intake tube can be disconnected from the throttle body. The intake tube is secured with a worm clamp, so it can be removed by loosening the clamp and sliding the tube off.
After removing the airbox and intake tube, the stock snorkel can be removed. The snorkel is held in place by several bolts, which can be removed using a 3/8" socket and ratchet. Once the bolts are removed, the snorkel can be pulled out of the car.
Step 3: Install the COBB Snorkel and Airbox
The next step is to install the COBB snorkel and airbox. Begin by placing the snorkel body in the stock snorkel location with the lid already attached. The lid can be secured using three M4 button head screws with fourmm black nylon washers. Use a 2.5mm hex key to loosely thread in the screws.
The snorkel should be slid into place at an angle to ensure it fits properly under the plastic lip on the car. Once the snorkel is in place, use a 2.5mm hex key to tighten the screws.
Next, install the airbox to the car in the stock snorkel mounting locations. Use two M4 button head screws with fourmm black nylon washers to secure the airbox. Once the two mounting screws are in place, tighten all of the screws holding the snorkel lid to the snorkel.
Step 4: Install the Intake Tube and Fittings
Once the snorkel and airbox are installed, the intake tube can be installed. Start by attaching the barbed vacuum fitting to the intake tube. Depending on whether you have a GTI or Golf R, you will either use the provided air pump adapter or air pump plug.
For the GTI, place the air pump adapter onto the air pump. For the Golf R, insert the provided air pump plug into the silicone hose.
Cut a piece of trim to about 12" and place it around the hole the intake tube will go through. This ensures a secure fit and prevents any air leaks.
Once the intake tube is in place, use the worm clamps to secure it to the throttle body and airbox. Use hose clamp pliers or traditional pliers to tighten the clamps, ensuring a snug fit.
Step 5: Final Checks and Reassembly
Before completing the installation, double-check all connections to ensure they are secure. Make sure the airbox is properly mounted, the intake tube is correctly positioned, and all clamps are tightened.
Once the installation is complete, reattach the engine cover. There is no need to reinstall the factory intake system, as the COBB SF Intake is now in place.
Installation Steps for Subaru Models
The installation process for Subaru models, including the WRX, STI, and FXT, is similar to the Volkswagen process. The COBB SF Intake is designed to replace the factory airbox without requiring cutting or permanent modifications. The following steps outline the installation process for Subaru models.
Step 1: Remove the Factory Airbox
Begin by removing the factory airbox. The airbox is held in place by several bolts and can be removed using a 3/8" socket and ratchet. Once the bolts are removed, the airbox can be pulled out of the car.
After removing the airbox, the intake tube can be disconnected from the throttle body. The intake tube is secured with a worm clamp, so it can be removed by loosening the clamp and sliding the tube off.
Step 2: Install the COBB Airbox and Intake Tube
Once the factory airbox is removed, the COBB airbox can be installed in its place. The airbox is designed to bolt directly into the stock mounting locations, so it can be secured using the provided hardware.
After securing the airbox, the intake tube can be installed. The intake tube is made from 4-ply steel-reinforced silicone, ensuring durability under boost and under-the-hood heat. The tube is secured with worm clamps, which can be tightened using hose clamp plers or traditional pliers.
Step 3: Install the Velocity Stack and Air Filter
The velocity stack is an important component of the COBB SF Intake, as it helps to smooth the airflow before it reaches the MAF sensor. The velocity stack should be installed according to the manufacturer's instructions, ensuring that it is properly aligned with the airbox.
The pre-oiled conical air filter is included with the kit and is ready to install. The filter should be placed in the airbox, ensuring that it fits securely and does not move during operation.
Step 4: Final Checks and Reassembly
Before completing the installation, double-check all connections to ensure they are secure. Make sure the airbox is properly mounted, the intake tube is correctly positioned, and all clamps are tightened.
Once the installation is complete, reassemble any components that were removed during the process. The COBB SF Intake is now in place and ready for use.
Tuning Requirements for COBB SF Intake
One of the most important considerations when installing a COBB SF Intake is the need for tuning. All aftermarket intakes for 2008 and newer models require tuning to ensure proper MAF scaling and safe operation. COBB Tuning offers Off-The-Shelf (OTS) Accessport maps specifically designed for SF Intake-equipped vehicles, making the tuning process simple and straightforward.
Why Tuning Is Necessary
The MAF sensor is responsible for measuring the amount of air entering the engine, which is used to calculate the appropriate fuel delivery. When the airflow is increased, as is the case with the COBB SF Intake, the MAF sensor must be recalibrated to ensure accurate readings. Without proper tuning, the engine may run lean or rich, which can lead to performance issues or even engine damage.
COBB Accessport and OTS Maps
COBB Tuning provides OTS maps that can be applied using the Accessport. These maps are pre-programmed with the necessary adjustments for the SF Intake and can be flashed onto the vehicle's ECU in minutes. This eliminates the need for custom tuning and ensures that the vehicle operates safely and efficiently.
For Volkswagen models, the tuning process is particularly important because the SF Intake is designed to work with the factory airbox mounting locations. While the installation is straightforward, the changes in airflow require adjustments to the engine's tuning parameters.
For Subaru models, COBB also offers OTS maps that are compatible with the SF Intake. These maps are designed to work with the factory ECU and ensure that the vehicle's fueling and ignition timing are properly adjusted for the increased airflow.
Installation of OTS Maps
To install an OTS map, the vehicle must be connected to the Accessport using a USB cable. The Accessport software will guide the user through the process of selecting the appropriate map and flashing it onto the ECU. Once the map is installed, the vehicle can be driven normally, and the new tuning will take effect immediately.
It is important to note that the tuning process should be completed before driving the vehicle under load, as the engine may run improperly without the correct tuning.
Safety and Legal Considerations
The COBB SF Intake is a performance part that is legal for sale and use on emissions-controlled vehicles in all 50 states. It meets the requirements set by the California Air Resources Board (CARB) and carries the appropriate Executive Order (EO) number. This ensures that the part is compliant with federal and state emissions regulations.
CARB Compliance
The COBB SF Intake is CARB-compliant and carries the Executive Order number D-660-8. This means that the part has been tested and certified to meet emissions standards and can be legally installed on vehicles in California and other states that follow CARB regulations.
Emissions and Warranty Considerations
While the COBB SF Intake is legal for use on emissions-controlled vehicles, it is important to understand how it may affect the vehicle's emissions system. The part is designed to improve airflow without affecting the emissions controls, but users should be aware that some modifications can impact emissions compliance.
For vehicles under warranty, it is important to understand the manufacturer's policy regarding modifications. While the COBB SF Intake is a performance part and may not void the warranty outright, it is recommended to consult with the manufacturer or a qualified technician before making any modifications.
Conclusion
The COBB SF Intake is a high-performance air intake system designed to improve airflow, enhance engine response, and provide a more aggressive induction sound. The installation process is straightforward and can be completed with basic hand tools, making it a practical upgrade for performance-oriented drivers. The system is designed to work with several Volkswagen and Subaru models, including the GTI, Golf R, WRX, STI, and MAZDASPEED 3.
The installation process involves removing the factory intake system and replacing it with the COBB kit, which includes all the necessary components for a complete and efficient airflow solution. The system is constructed from a one-piece high-temperature plastic composite, which minimizes heat transfer and reduces the risk of heat soak. It also includes a CFD-engineered velocity stack and airflow straightener grid, ensuring smooth and consistent airflow to the MAF sensor.
It is important to note that the SF Intake requires tuning to ensure proper operation, particularly for 2008 and newer models. COBB Tuning offers Off-The-Shelf (OTS) Accessport maps that can be applied in minutes, streamlining the tuning process and ensuring safe operation. The tuning process is essential for maintaining proper MAF scaling and preventing engine damage.
The COBB SF Intake is a legal and compliant performance part that meets the requirements set by the California Air Resources Board (CARB). It carries the appropriate Executive Order number and is available for use on emissions-controlled vehicles in all 50 states. Users should be aware of the potential impact on emissions compliance and consult with the manufacturer or a qualified technician before making any modifications.
Overall, the COBB SF Intake is a reliable and effective upgrade for Volkswagen and Subaru models, offering improved performance, enhanced engine response, and a more aggressive driving experience. With proper installation and tuning, it can provide a noticeable improvement in both power and efficiency.