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Is DynoVox's Racing Exhaust Header the Ultimate Upgrade for Your 2008-2014 Subaru WRX/STI?
DynoVox Racing Style Exhaust Header for 2008-2014 Subaru Impreza WRX/STI (GE/GH/GR/GV) 2.5L EJ25 enhances exhaust flow, reducing backpressure for increased horsepower and torque. Precision-engineered for performance, this header improves throttle response and delivers a deep, aggressive exhaust tone. Constructed from durable materials, it ensures longevity and reliability for both track and street applications. Elevate your WRX/STI’s performance with DynoVox’s high-flow exhaust solution.
The Benefits of an Equal-Length Exhaust Header
1. Unlock Greater Horsepower with Enhanced Torque
An equal-length exhaust header can increase horsepower by 8% to 12% and torque by 6% to 10%, making it an essential upgrade for enthusiasts seeking peak performance.
2. Optimize Vehicle Weight Distribution
Crafted from lightweight, high-quality stainless steel, this header reduces vehicle weight by 10–30 pounds. This improvement brings the front-to-rear weight ratio closer to the ideal 50:50, enhancing acceleration, handling, and braking response.
3. Transform Your Vehicle’s Sound
Enjoy a richer, more dynamic exhaust note. The design produces a deeper, more aggressive tone at low RPMs, and a thrilling, high-performance roar at higher RPMs.
4. Boost Fuel Economy Through Optimized Exhaust Flow
For daily drivers or those not pushing extreme performance, this header improves fuel efficiency by approximately 3% for inline-4 and inline-6 engines, and up to 5% for V6 and V8 engines—perfect for long-term fuel savings.
| Brand | DynoVox | SKU | QMP-HW00499 |
| Body Material | High Quality Stainless Steel | Color | Silver |
| Weight | 7.78kg | Comply with Factory Testing Standards | Yes |
| Head Flange Thickness | 7/16" | Primary Tube Size | 1.75" |
| Outlet Flange Thickness | 3/8" | Outlet Size | 2.25" |
| Type | Exhaust Header | Warranty | 3 Years |
| Number of O2 Sensor Locations | 2(1 on header and 1 on up pipe) |
| Package Includes | 1*Exhaust Header 1*Pipe 4*Gasket 1 Pack Screws & Nuts |
| Installation Location | Engine |
| Item Condition | New |
Warranty and Shipping Services
We provide a 3-year warranty and a 30-day free return and exchange service, so you have no worries. At the same time, you can enjoy fast and free shipping within the United States.
DISCLAIMER
1. By installing this product onto your vehicle, you assume all risk and liability associated with its use.2. It is your responsibility to make sure your Vehicle complies with all federal, state, and local emissions laws. Federal and many state and local laws prohibit the removal, modification, or rendering inoperative of any part of the design affecting emissions or safety on motor vehicles used on a public street or highway Violation may result in a fine of up to $ 32,500 per vehicle ( or possibly higher depending on changes in the law ). All civil penalties and fines for removing your vehicle emissions equipment are the sole responsibility of the end user.3. Due to its high-performance nature, this product may void the vehicle manufacturer's warranty.4. DynoVox is not responsible for the misuse of its products By installing this product, you release DynoVox of any liability associated with its use.5. Depending on where you live, restrictions may apply. Check all applicable laws before installing or using.6. The purchaser and end-user release, indemnities, discharges, and holds harmless DynoVox from any claims, damages, causes of action, injuries, or expenses resulting from or relating to the use or installation of this product that is in violation of the terms and conditions on this page, the product disclaimer, and/or the product installation instructions. DynoVox will not be liable for any direct, indirect, consequential, exemplary, punitive, statutory, or incidental damages or fines caused by the use.
Frequently asked questions