SKU: B712010-BK | UPC: 799928864770
Cobb Subaru Post MAF Hose – Stealth Black for 2002-2021 WRX & STI
The Cobb Post MAF Hose in Stealth Black replaces the OEM hose between the mass air flow sensor and throttle body on 2002-2021 Subaru WRX and STI models. Made from durable 4-ply reinforced silicone with a 2.75-inch inner diameter, it delivers smoother airflow than the restrictive factory part. Drivers notice immediate gains in throttle response and engine efficiency.
Key Features
- 4-Ply Reinforced Silicone: Handles high boost levels and engine bay heat without cracking or collapsing for long-term reliability.
- 2.75-Inch Inner Diameter: Expands beyond stock size to allow more air volume, supporting higher RPM power and quicker acceleration.
- Smooth Interior Bore: Promotes laminar airflow with minimal turbulence, reducing pressure drop and improving volumetric efficiency.
- Stealth Black Finish: Low-profile color blends into engine bays while resisting fading from oils, fuels, and heat exposure.
- Included T-Bolt Clamps: Stainless steel clamps ensure secure, vibration-resistant connections without slipping under load.
Product Notes
- Direct replacement for stock hose; no modifications or tuning required.
- Compatible with stock intake, Cobb SF Intake, and most aftermarket systems.
- Packaged for protection; inspect clamps before install.
Installation Notes
- Professional installation recommended.
- Remove OEM hose by loosening clamps at MAF outlet and throttle body inlet; install new hose in reverse.
- T-bolt clamps torque to 50 in-lbs fits stock MAF housing and throttle body perfectly.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2021 | Subaru | Impreza | WRX STI |
| 2008-2014 | Subaru | Impreza | WRX |
| 2015-2021 | Subaru | WRX | Base, Limited, Premium |
Why Choose Cobb?
- Subaru-specific engineering from decades of rally and track development.
- Direct-fit parts tested on dyno and street for real-world gains.
- Backed by limited warranty and U.S.-based support.
Frequently Asked Questions
- Q: Will this fit 2015+ Subaru WRX models?
A: Yes, it bolts directly to the FA20DIT MAF housing and throttle body on 2015-2021 WRX. - Q: What material is used and how durable is it?
A: 4-ply reinforced high-temp silicone rated for 300°F continuous, resists boost up to 40 psi. - Q: Does installation require special tools or tuning?
A: No special tools needed beyond basic hand tools plug-and-play with no ECU changes required.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Protective box measuring 10.5 x 7 x 4 inches
- Weight: 0.75 lbs
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