SKU: 3106-EX008 | UPC: 4957266932070
HKS 02-07 WRX / 04-07 STi Hiper Exhaust
The HKS Hiper Exhaust is a full cat-back system crafted for 2002-2007 Subaru Impreza WRX and 2004-2007 Impreza WRX STI models. This setup uses mandrel-bent piping to improve exhaust flow delivering noticeable horsepower and torque gains plus a deep throaty exhaust tone. At 17.2 kg it cuts weight versus the stock 21 kg muffler for quicker acceleration and handling response.
Key Features
- SUS304 Stainless Steel Piping: Mandrel-bent 60.5-80mm diameter pipes resist corrosion and promote unrestricted flow for power increases up to 12 PS
- Titanium Single Muffler: Lightweight 4-inch rolled-edge titanium tip adds style reduces weight and withstands high heat for long-term durability
- Hi-Power Design: Internal baffled silencer produces 92 dB sound at 4500 rpm balancing aggressive tone with track-ready volume
- Direct Bolt-On Fit: Precision-engineered hangers and flanges match OEM mounting points for easy replacement on GD chassis WRX and STI
- Weight Reduction: 17.2 kg system shaves 3.8 kg off stock improving vehicle balance and throttle response
Product Notes
- Verify local noise regulations before installation
- Clean exhaust tip regularly to maintain polished finish
- Ships in two boxes for secure transit
Installation Notes
- Professional installation recommended.
- Remove stock cat-back from midpipe flange rearward
- Includes all gaskets clamps and hardware for OEM-like fit
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2004-2007 | Subaru | Impreza WRX | STI |
Why Choose HKS?
- Motorsport-proven since 1973 with World Rally wins
- JDM manufacturing standards ensure fit and finish
- Dyno-tested designs deliver real-world power gains
Frequently Asked Questions
- Q: Does this fit 2005 WRX hatchback and sedan?
A: Yes fits all body styles including sedan hatchback and wagon for 2002-2007 Impreza WRX - Q: What materials are used in construction?
A: SUS304 stainless steel piping paired with titanium muffler and 101.6mm tip for strength lightweight performance and heat resistance - Q: What warranty coverage applies?
A: HKS provides 12-month limited warranty against manufacturing defects when installed properly
Shipping & Handling
- Method: Ground
- Availability: In stock – ships same or next business day
- Packaging: Ships in two boxes Box 1 60x16x15 inches Box 2 52x14x14 inches
- Weight: 38 lbs
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