This HKS Turbo Exhaust Manifold is a perfect OEM replacement for the Subaru WRX (2002 - 2014) and STI (2004 - 2021). It's made of 409 stainless steel, lighter and more efficient than the factory manifold. It optimizes exhaust flow, boosts spool, and increases horsepower and torque while reducing turbo lag. It produces an aggressive exhaust note and works with 2 - bolt flange up - pipes. The package includes new gaskets, hardware, heat wrap, and worm clamps. Fitment notes: 2004 - 2007 STI has the same oil pan; 2002 - 2005 WRX needs an STI oil pan; 2006 - 2007 WRX needs an STI oil pan and oil cooler.
Using this HKS exhaust manifold is easy. First, make sure your vehicle is one of the compatible Subaru WRX or STI models mentioned. Then, carefully remove the old manifold. When installing the new one, use the included gaskets, hardware, heat wrap, and worm clamps. The 2 - bolt flange up - pipes make the connection straightforward. As for maintenance, regularly check the hardware for tightness, especially after long drives. Keep an eye on the heat wrap for any signs of wear. If you notice a change in exhaust sound or performance, it might be time to check the manifold for possible damage. Also, make sure the oil pan and oil cooler meet the fitment requirements for your specific model to ensure proper operation.
