Invidia Q300 Single Exit Cat Back Exhaust - 2002-2007 Subaru WRX/STI

The Q300: Street-Legal Sound Without the Street Compromise

The Invidia Q300 Cat-Back Exhaust with Stainless Steel Tip for the 2002-2007 Subaru WRX / STI is tuned specifically for the daily-driven enthusiast — more aggressive than stock, with a clear performance exhaust note, but calibrated to avoid the drone and cabin resonance that make some exhausts unlivable on a commute. The Q300 delivers improved exhaust flow and an engaging sound character without demanding anything from the driver in return.

Tuned for the Street — Not Tuned Down

The Q300's sound tuning is a deliberate design choice, not a compromise. Invidia specifically developed the Q300 to sit above a mild cat-back in volume and character while avoiding the resonance peaks that cause cabin drone at highway speeds. The 3-inch mandrel-bent SUS304 stainless construction provides a genuine improvement in exhaust flow over the factory system — this is not a tone-only upgrade, it moves real air and produces real mid-range and top-end gains.

SUS304 Stainless, OEM Hanger Fitment, Complete Hardware

The Q300 is built from SUS304 stainless steel with mandrel bends that maintain the full 3-inch internal diameter through every curve. CNC-machined flanges and OEM-position hanger welds mean the system bolts directly to the GD WRX/STI at the factory downpipe flange and hanger locations. New gaskets and hardware are included — installation is bolt-in with no modification required.

Key Features

• Platform: 2002-2007 Subaru WRX / STI
• SUS304 stainless steel construction
• 3-inch mandrel-bent piping — full diameter maintained at every bend
• Single exit — Stainless Steel tip
• CNC-machined flanges — flat, leak-free sealing at all connection points
• Exhaust hangers welded at OEM locations — direct bolt-in fitment
• Improves horsepower, torque, and throttle response
• New gaskets and hardware included

Fitment Notes

• Platform: 2002-2007 Subaru WRX / STI
• Direct bolt-in at OEM downpipe flange and hanger locations
• No modification to the vehicle required

Straight From Subispeed

The Q300 hits the sweet spot for daily-driven GD WRX/STI builds — loud enough to hear clearly, tuned well enough that it doesn't make the drive tiring. If you spend real time in the car every day and want an exhaust that sounds like a performance car without making you regret it on a 45-minute highway commute, the Q300 is the correct choice over the more aggressive options in the Invidia lineup. New gaskets and hardware are in the box, and OEM hanger fitment means a clean, straightforward installation.

What's Included

• Invidia Q300 cat-back exhaust
• Stainless Steel exhaust tip
• New gaskets and installation hardware

About Invidia

Invidia is a Taiwanese performance exhaust manufacturer with a strong following in the Subaru, Mitsubishi, and Japanese sports car communities. Their catalog covers cat-back exhausts, downpipes, headers, manifolds, and full exhaust systems built around SUS304 stainless steel construction with CNC-machined flanges and direct OEM fitment. Invidia exhausts are among the most widely installed aftermarket systems on Subaru platforms globally — well-documented, well-supported, and proven across thousands of street and track builds. Subispeed carries the full Invidia lineup because their combination of quality construction, fitment accuracy, and range of tip and finish options makes them the exhaust brand we recommend to Subaru owners at nearly every power level.