SKU: BEWG-FITTING-UPGRADE-KIT | UPC: 799928864794
Cobb 1/4" EWG Fitting Upgrade Kit for 3-Port EBCS Subaru WRX STI 2002-2021
The Cobb EWG-FITTING-UPGRADE-KIT delivers 1/4" NPT to 1/4" barb fittings, seals, and vacuum caps to upgrade Cobb 3-Port EBCS for external wastegates on Subaru WRX and STI models 2002-2021. It replaces factory 4mm fittings for proper vacuum routing with 1/4" lines, preventing leaks that disrupt boost control in high-boost turbo setups. This ensures reliable performance for tuned engines with external wastegates.
Key Features
- 1/4" Hose Compatibility: Matches external wastegate vacuum lines for direct connection without adapters
- Brass Fittings with O-Rings: NPT threads seal tightly to resist vibration and heat in turbo environments
- Complete Kit Contents: Two 1/4" NPT to barb fittings, O-ring seals, and vacuum caps for full installation
- Leak-Proof Design: Maintains vacuum integrity for consistent boost response across RPM range
- USA-Made Precision: Machined brass and aluminum components built for durability in performance applications
Product Notes
- Required for Cobb 3-Port EBCS setups using external wastegates with 1/4" vacuum lines
- Part Number EWG-FITTING-UPGRADE-KIT, MPN EWG-FITTING-UPGRADE-KIT
- In stock items ship same or next business day via ground carrier
Installation Notes
- Professional installation recommended.
- Installation Time: 10-20 minutes; unscrew factory 4mm fittings and install 1/4" barbs with O-rings
- Compatible with all Cobb 3-Port EBCS units; torque to 10-15 ft-lbs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2008-2014 | Subaru | WRX | All |
| 2015-2021 | Subaru | WRX | All |
| 2004-2009 | Subaru | Impreza WRX STI | All |
| 2010-2014 | Subaru | WRX STI | All |
| 2015-2021 | Subaru | WRX STI | All |
| 2013-2021 | Subaru | BRZ | All |
Why Choose Cobb?
- World leader in turbocharged performance tuning
- Precision-engineered components for reliable boost control
- Made in the USA trusted by professional tuners
Frequently Asked Questions
-
Q: Does this fit all Cobb 3-Port EBCS on WRX/STI?
A: Yes, designed for all versions used with 1/4" external wastegate lines on 2002-2021 Subaru models. -
Q: What material are the fittings?
A: Brass barbs with O-ring sealed NPT threads and aluminum caps for corrosion resistance. -
Q: What is the warranty and install time?
A: 1-Year Limited Warranty; installs in 10-20 minutes by replacing factory fittings.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Official Cobb Tuning retail packaging, box dimensions 5" x 3" x 1"
- Weight: 0.1 lbs
COBB
COBB Tuning Performance Parts deliver proven power gains with factory-like drivability backed by an "Engineered Performance" approach trusted by enthusiasts, pro tuners, and performance shops worldwide. Founded in 1999 and now headquartered in Austin, Texas, COBB designs, engineers, tests, and supports its products in-house to ensure reliable results across today's most popular performance platforms. Shop the full lineup of COBB Tuning performance parts at Black Ops Auto Works, including ECU tuning solutions, bolt-on upgrades, and staged power packages built to work together for predictable, repeatable performance. COBB ECU Tuning & Accessport The COBB Accessport is one of the most trusted ECU tuning devices in the industry. It enables safe ECU flashing, live data monitoring, diagnostics (read/clear codes), and tuning management helping drivers unlock stronger throttle response, improved drivability, and dependable horsepower and torque gains when paired with the right supportin...
View COBB Products
Engine
This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...
View Engine Products
Fuel Components Misc
Fuel system builds require dozens of small components that rarely get featured on their own but are essential to a leak-free, properly functioning setup. Miscellaneous fuel hardware includes everything from AN fittings and hose barbs to fuel cell foam, bung plugs, check valves, and return-line adapters that allow builders to connect aftermarket components to factory fuel circuits. In both EFI and carbureted applications, the reliability of the entire fuel system ultimately depends on the quality of each fitting, clamp, and connector in the line. Professional builders and DIY fabricators both rely on a well-stocked supply of these components to avoid mid-build delays. Popular Upgrades Top-selling miscellaneous fuel components include Earl's and Fragola AN-to-NPT fuel fittings for adapting custom fuel lines, Aeromotive weld-in bungs and NPT plugs for fuel cell fabrication, and Holley fuel line adapters for connecting late-model EFI rails to carbureted or aftermarket fuel systems. Vito...
View Fuel Components Misc Products
Fuel Delivery
A properly designed fuel delivery system is the backbone of any high-performance engine build, ensuring the injectors or carburetor receive a consistent supply of fuel at the correct pressure regardless of engine load, RPM, or fuel demand. From factory replacement pumps keeping daily drivers on the road to high-flow in-tank modules supporting 1000-horsepower builds, the right fuel delivery components prevent lean conditions, injector damage, and fuel starvation at the worst possible moment. Modern EFI systems are particularly sensitive to fuel pressure variation, with even small drops causing misfires and power loss under hard acceleration. Whether you are restoring a factory system or engineering a purpose-built race setup, matching pump flow rate and fuel pressure regulation to your injector and engine requirements is essential. Popular Upgrades Top-selling fuel delivery components include Aeromotive Phantom in-tank fuel pump kits that retrofit into factory tanks without custom fa...
View Fuel Delivery Products


