HKS 02-07 WRX / 04-07 STi Sport Exhaust

HKS is well-known for making performance parts that help Subarus breathe easier and sound better. This Sport Cat-back exhaust system is built for the 2002-2007 Subaru WRX and the 2004-2007 Subaru STi. It replaces the factory exhaust from the catalytic converter back, aiming to improve exhaust flow and give your car a more aggressive sound.

This system is constructed from SUS304 stainless steel, which is a strong material that resists corrosion and holds up well under the heat of exhaust gases. The piping diameter is 75mm (about 3 inches), which is larger than stock, allowing exhaust gases to exit more freely. This improved flow can lead to a slight increase in horsepower and torque, especially when combined with other engine modifications. The muffler design is tuned to produce a sportier exhaust note without being overly loud or droney for daily driving. Installation is designed to be a direct bolt-on replacement for the factory system, using the original mounting points.

When installing this cat-back system, you'll want to ensure you have the necessary hardware. While this kit is designed as a direct fit, it's always a good idea to inspect your factory exhaust hangers and ensure they are in good condition, as they are often reused. The larger diameter piping and sport muffler will change the sound of your vehicle, giving it a more pronounced tone under acceleration.