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The HKS 02-07 WRX / 04-07 STi Hiper Exhaust is designed for the 2002-2007 Subaru Impreza. Match manufacturer part number 3106-EX008, the complete vehicle or system configuration, dimensions, connections, and included components before ordering.
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.
- 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.
- SUS304 stainless steel piping paired with titanium muffler and 101.6mm tip for strength lightweight performance and heat resistance.
- Titanium Single Muffler: Lightweight 4-inch rolled-edge titanium tip adds style reduces weight and withstands high heat for long-term durability.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | Confirm engine, body style, system configuration, and exact interface |
Specifications
| Brand | HKS |
|---|---|
| Manufacturer Part Number | 3106-EX008 |
| Product Type | Catback |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new HKS catback identified by manufacturer part number 3106-EX008, in the quantity stated by the title. Additional wiring, pipes, hoses, clamps, fittings, gaskets, fluids, tuning, tools, and installation hardware are included only when expressly listed for this exact part number.
About HKS
HKS develops exhaust, forced-induction, cooling, engine, electronics, and exterior components for import and performance vehicle applications.
Related HKS Products
- Shop all HKS products
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Frequently Asked Questions
How do I confirm this HKS exhaust part fits?
Match the manufacturer part number, listed year, make, and model, body style, engine, exhaust diameter, flange locations, and available underbody clearance.
Does this listing include every part needed for installation?
Only the items stated in the title and What’s Included section are supplied. Gaskets, adapters, hardware, hangers, or connecting pipes may be separate for some applications.
Will the exhaust change sound or require tuning?
Sound varies with the complete exhaust system and vehicle. Tuning requirements depend on the application, emissions equipment, and other modifications, so confirm with the vehicle tuner before installation.
Installation Instructions
Follow the current HKS instructions and the vehicle service manual for part number 3106-EX008. Compare every component, connection, dimension, and mounting point before disassembly. Use the correct tools, fasteners, torque values, fluids, wiring protection, and safety procedures, then inspect for leaks, interference, heat exposure, clearance, and secure operation before normal use.
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