HKS MTL CAT GRB w/ F-Pipe

If you're looking to upgrade the exhaust system on your Subaru GRB WRX STI, this HKS MTL CAT GRB w/ F-Pipe is a solid option. This unit replaces the factory catalytic converter and a section of the exhaust piping with a high-flow unit designed to improve exhaust flow and sound. It's built to work with HKS's own exhaust systems, aiming for a more direct path for exhaust gases away from the engine.

This catalytic converter and pipe assembly is constructed from durable stainless steel, which helps resist corrosion and ensures it can handle the heat and stress of a performance exhaust. The design focuses on reducing backpressure compared to the stock setup. This can lead to a more responsive engine feel and a deeper, more aggressive exhaust note that many enthusiasts look for. The F-pipe section is integrated to ensure a smooth transition and proper fitment when paired with compatible HKS exhaust components.

Keep in mind that this part is not CARB approved and cannot be shipped to California. It's designed as a direct replacement for specific Subaru GRB WRX STI models, so checking fitment is crucial. For the best results and a complete system, it's recommended to pair this with other HKS exhaust parts designed for your vehicle.