Exhaust Header
FOR 02-06 IMPREZA WRX/STI GDB GG EJ20/EJ25 STAINLESS STEEL EXHAUST RACING HEADER
A 1-7/8 inch stainless steel racing header for the 2002-2006 Impreza WRX and STI GDB and GG models with EJ20 and EJ25 engines. It replaces the factory exhaust manifold with a shorty header design and ships as a complete unit with flanges and mounting hardware. Fitment is specific to the listed years and models and does not cover other Subaru platforms.
- MaterialStainless Steel
- ExclusionDoes not fit other Subaru models or engines
What You Get
Key Benefits
- 1-7/8 inch primary tubes increase exhaust flow and reduce back pressure compared to the factory manifold
- Stainless steel construction resists heat and corrosion better than cast iron or mild steel
Why Buyers Switch
Problems It Solves
- Factory cast iron manifolds restrict exhaust flow and increase exhaust gas temperature under boost
- Mild steel headers warp and crack under repeated heat cycles from turbocharged engines
- Poorly machined flanges leak at the cylinder head joint, causing vacuum leaks and power loss
- Universal headers require custom fabrication, which adds labour and reduces shop margins
Where It Is Used
Application Scenarios
- Performance shops upgrading turbocharged Subarus for track or street use
- Distributors stocking vehicle-specific headers for the 2002-2006 WRX/STI market
- Online sellers needing a photographed, fitment-verified header for e-commerce listings
- Tuning shops installing headers that require no cutting or welding for faster turnaround
Buyers
Who It Is For
- Performance parts distributors buying direct for the 2002-2006 WRX/STI market
- Online auto parts sellers requiring vehicle-specific fitment data and clear images
Construction
Technical Features
- 1-7/8 inch primary tubes with shorty header design for compact fitment
- Complete kit includes header, flanges, and mounting hardware as specified
- Bolt-on replacement geometry that follows the factory routing and clearances
Data
Specifications
| Material | Stainless Steel |
|---|---|
| Exclusion | Does not fit other Subaru models or engines |
Material
Materials
- Stainless steel tube
Manufacturing
How It Is Made
Tube bending to match the factory header routing
Final fit check against the cylinder head pattern before packing
Checks
Quality Control
- Flange bolt pattern and sealing face checked before welding
- Weld seams inspected for pinholes along the full joint
Private Label
Customisation Options
- Private label packaging and barcode labels on request
- Bulk cartons available for container orders instead of retail boxes
Comparison
Compared With The Alternatives
| Factory cast iron manifold | The stock manifold is heavier and restricts flow; this header improves exhaust velocity and reduces EGTs |
|---|---|
| Mild steel aftermarket header | Mild steel is cheaper but warps and cracks under repeated thermal stress; stainless steel holds shape longer |
| Universal cut-to-fit header | A universal header requires cutting and welding; this one bolts on without modification |
Installation
Use Guide
- Confirm the vehicle is a 2002-2006 Impreza WRX or STI GDB or GG with EJ20 or EJ25 engine
- Let the engine cool completely before removing the factory manifold
- Replace the cylinder head gasket rather than reusing the old one
- Torque flange bolts evenly in a cross pattern to maintain sealing face flatness
- Recheck flange torque after the first heat cycle to prevent leaks
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Answers
Questions About This Part
Will this fit a 2007 Impreza WRX with EJ25 engine?
No. The part covers 2002-2006 Impreza WRX and STI GDB and GG models with EJ20 and EJ25 engines. It does not fit 2007 or later models.
What size are the primary tubes?
1-7/8 inch. This matches the factory header size and improves flow without requiring modifications.
What is included in the package?
One header with flanges and mounting hardware. Gaskets are not included; a new cylinder head gasket is required.
Can we get our own brand on the box?
Yes. Private label packaging and barcode labels can be arranged, and bulk cartons are available for container orders.
Is this street legal where I sell?
Emissions rules differ by market and we make no emissions approval claim for this part. Check your local regulations before resale.
Get This Part Quoted
Send the quantity you need and your market, and the reply will cover price, packing and lead time.