SKU: HS02SW1TRG
Invidia HS02SW1TRG 2002-2007 Subaru WRX STI Full Titanium Cat-Back Exhaust System
The Invidia full titanium cat-back exhaust system, designed specifically for these models to deliver enhanced engine breathing and a refined driving experience. This 80mm piping exhaust starts right after the catalytic converter, replacing the restrictive factory setup to allow freer flow of exhaust gases. Built entirely from lightweight titanium, it provides substantial weight reduction compared to traditional stainless steel systems—dropping around 15-20 pounds off the rear of your vehicle for better handling and acceleration. Dyno testing confirms gains of up to 10-15 horsepower and similar torque improvements, particularly in the mid-to-high RPM range, while reducing turbo lag for quicker spool-up and sharper throttle response. The single rear-exit design produces a deep, aggressive tone that evolves from a subtle rumble at idle to a high-rev roar under load, without the drone common in lesser aftermarket options.
Crafted with precision welding and mandrel-bent tubing, the HS02SW1TRG ensures seamless integration and long-term reliability under track or street conditions. Its corrosion-resistant titanium construction withstands heat cycles and road debris better than alternatives, making it the direct fit solution that outperforms stock and budget exhausts in power delivery, sound quality, and overall vehicle balance. For Subaru WRX and STI owners seeking a bolt-on upgrade that transforms daily drives and weekend runs, this system stands out by combining measurable performance boosts with a premium finish that complements the car’s sporty aesthetics.
Key Specifications
Piping Diameter: 80mm (mandrel-bent for smooth flow)
Exhaust Tip Diameter: 101mm (polished titanium finish)
Material: Full titanium throughout (midpipe, muffler, and tips)
Exhaust Type: Cat-back, single rear exit, non-resonated racing design
Sound Profile: Deep and throaty, with increased volume over factory (no cabin drone)
Weight Savings: Approximately 15-20 lbs lighter than comparable stainless steel cat-backs
Vehicle Fitment
Years: 2002-2007
Make: Subaru
Models:
- 2002-2007 Impreza WRX (all trims, including base and premium)
- 2004-2007 Impreza WRX STI (all trims, including base and limited)
Notes: Direct bolt-on installation; no modifications required. Compatible with stock or aftermarket catalytic converters. Not for vehicles with active exhaust valves.
What’s Included in the Purchase
- Complete titanium cat-back exhaust assembly (midpipe section from cat-back flange, single canister muffler, and 101mm rolled-edge tip)
- Stainless steel mounting clamps and hangers
- New gaskets for flange connections
- All necessary bolts, nuts, and hardware for installation
- Installation instructions (basic overview; professional tuning recommended for optimal results)
Shipping Information
Package Weight: 25 lbs
Box Dimensions: 59 in (L) x 18 in (W) x 12 in (H)
This Invidia HS02SW1TRG exhaust is the engineered choice for 2002-2007 Subaru WRX and STI enthusiasts who demand real-world gains in power, efficiency, and enjoyment from every drive. Install it to feel the difference in responsiveness and hear the signature Subaru growl!
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
| 2006-2007 | Subaru | Impreza | WRX TR |
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