Specifications
Part Details:
The IAG Performance Unequal Length 3-Bolt Header and Uppipe is designed for 2002–2014 Subaru WRX, 2004–2021 STI, 2005–2009 Legacy GT, and 2004–2008 Forester XT models. Engineered to improve exhaust flow while maintaining the signature Subaru unequal length rumble, this header and uppipe combination enhances turbo response and overall performance.
Built for EJ-based turbocharged applications, this system improves exhaust scavenging and reduces backpressure compared to restrictive factory components, making it an ideal upgrade for street and performance-focused builds.
Key Features
- Unequal length header design for classic Subaru exhaust tone
- 3-bolt flange configuration for proper fitment
- Includes matching uppipe for improved exhaust flow
- Designed for EJ-series turbocharged engines
- Improves turbo spool and throttle response
- Durable construction for street and performance use
- Compatible with factory-style turbo configurations
Performance Benefits
Upgrading to a high-flow header and uppipe system helps reduce exhaust restriction before the turbocharger, allowing for quicker spool and improved throttle response. The unequal length design preserves the iconic Subaru exhaust note while delivering measurable improvements in exhaust efficiency.
Fitment
- 2002–2014 Subaru WRX (EJ turbo models)
- 2004–2021 Subaru STI
- 2005–2009 Subaru Legacy GT
- 2004–2008 Subaru Forester XT
What’s Included
- IAG unequal length header
- Matching 3-bolt uppipe
- Required hardware
FAQs
What is the benefit of an unequal length header?
Unequal length headers preserve the classic Subaru boxer rumble while improving exhaust flow compared to restrictive factory manifolds.
Does this improve turbo response?
Yes. Reducing exhaust restriction before the turbocharger can help improve spool characteristics and throttle response.
Is tuning recommended after installation?
Tuning is recommended when modifying exhaust components on turbocharged vehicles to ensure optimal performance and reliability.
Will this fit FA-series engines?
No. This header and uppipe system is designed for EJ-series turbocharged applications only.
Recommended Upgrades
- Browse exhaust systems and components
- Shop all IAG Performance products
- Explore Subaru WRX performance parts
- Explore Subaru STI performance parts
Shipping
Shipping Options:
WrenchMastersAuto.com ships your performance parts safely, quickly and conveniently nationwide via the most trusted shipping carriers such as: UPS, Fed Ex, USPS, and DHL.
Delivery Times:
- In Stock: 3-7 Business Days
- Custom Orders: 2-6 Weeks, Please Email: [email protected] or Call: 727-565-9808 for Questions.
Enjoy FREE SHIPPING on most orders over $199!
Contact WrenchMasters
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