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SKU: 1419-RF001 | UPC: 4957266931936
HKS SUBARU GDB EJ207 Stainless Steel Exhaust Manifold 2004-2007 Impreza WRX STI
The HKS 1419-RF001 stainless steel exhaust manifold fits Subaru Impreza WRX STI GDB models equipped with the EJ207 engine. This tubular replacement outflows the factory cast iron unit for gains in horsepower torque and throttle response. Drivers experience faster turbo spool and smoother power delivery on street or track.
Key Features
- Stainless Steel Construction: SUS304 material resists corrosion and high heat for long-lasting performance in demanding conditions.
- Tubular 4-2-1 Design: Equal length runners and merged collector improve exhaust scavenging and mid-range torque.
- Weight Reduction: 11.8 kg unit drops 10+ kg versus stock for quicker engine revving and better handling balance.
- Precise Fitment: Direct bolt-on engineering matches GDB chassis flanges and routing without fabrication.
- Power Gains: Dyno-tested increases of 10-15 whp with supporting mods like intake and tune.
Product Notes
- Pair with HKS downpipe and cat-back for full exhaust benefits.
- Retorque bolts after 100 miles of heat cycles.
- Oversized item ships via ground carrier with signature required.
Installation Notes
- Professional installation recommended.
- Reuse or replace OEM gaskets and studs during swap.
- Compatible with factory turbocharger and downpipe hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2007 | Subaru | Impreza WRX STI | GDB EJ207 |
Why Choose HKS?
- Motorsport-proven designs from Super GT and rally programs.
- Hand-welded quality from Japanese facility.
- Engineered for STI owners chasing track-ready power.
Frequently Asked Questions
-
Q: Will this fit 2004-2007 USDM STI models?
A: Designed specifically for JDM GDB EJ207 6MT chassis bolt-on installation may need minor adjustments for EJ257 variants. -
Q: What material and thickness is used?
A: Full SUS304 stainless steel with 16-18 gauge tubing for strength and heat tolerance over 1000 degrees C. -
Q: What warranty covers this manifold?
A: HKS offers 1-year limited warranty against manufacturing defects with proof of purchase.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Sturdy oversized carton 30 x 20 x 12 inches
- Weight: 28 lbs shipped (11.8 kg product)
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