HKS Super Turbo Catback Exhaust 2004-2007 STI

Here, you are looking at the HKS Silent Hi-power Catback Exhaust for your 2002-2007 WRX/STI. 

"High-dimensional Super Turbo Muffler Debut"

Exhaust Efficiency & Sound Pressure Reduction are implemented together.
The turbo engine master HKS challenged to implement the following 3 characteristics together to develop Super Turbo Muffler.

Effective on stock to high-performance vehicles w/ upgraded turbines.
The performance exhaust sound meets the JASMA standard.
Unique exhaust sound designed specifically for the engine.

Details:

• 124mm Burnt Tip
• 304 Stainless Construction
• 91 Decibels for a reasonable but sporty tone (WRX Models)
• Special Order Product 

Note: A OEM Downpipe to 3in Cat Back Adapter may be necessary if the diameter of the new cat-back exhaust systems piping is different from the stock system, or if there are compatibility issues between the new components and the existing downpipe.