HKS Sport Cat-Back Exhaust | 02-07 Subaru WRX / 04-07 STI

Overview

HKS Sport Exhaust systems are engineered to reduce backpressure and increase exhaust flow for greater peak power and a broader torque band. Each application uses a specific muffler design, shape, and piping diameter to maintain low-end torque while maximizing high-end horsepower.

Specifications

• Fitment: 2002–2007 Subaru WRX / 2004–2007 STI
• Piping diameter: 75mm
• Tip diameter: 106mm
• Tip style: DR

Installation Notes

• Professional installation recommended
• Road clearance data based on stock suspension height — may vary with lowering springs or coilovers
• Verify fitment with your specific chassis and build before ordering