This HKS Turbo Exhaust Manifold is an ideal OEM replacement for the Subaru WRX (2002 - 2014) and STI (2004 - 2021). It uses a standard 2 - bolt uppipe connection and comes with gaskets and a heat shield blanket. The headers are crafted from 409 stainless steel, making them lighter and more efficient than the factory manifold. They optimize exhaust flow, boost spool, increase horsepower and torque, and reduce turbo lag. The headers also produce an aggressive exhaust note. They work well with 2 - bolt flange up - pipes and include new gaskets, hardware, heat wrap, and worm clamps. Fitment notes: 2004 - 2007 STI models have the same oil pan; 2002 - 2005 WRX models need an STI oil pan; 2006 - 2007 WRX models require an STI oil pan and oil cooler.
Using this HKS Turbo Exhaust Manifold is straightforward. First, make sure your vehicle is in the supported models: Subaru WRX from 2002 - 2014 and STI from 2004 - 2021. Check the fitment notes. If you have a 2004 - 2007 STI, you're good with the same oil pan. For 2002 - 2005 WRX, you'll need an STI oil pan, and 2006 - 2007 WRX need an STI oil pan and oil cooler. When installing, use the included gaskets, hardware, heat wrap, and worm clamps. They're designed to work well with the 2 - bolt flange up - pipes. As for maintenance, regularly check the connections to ensure they're tight. Keep an eye on the heat wrap and gaskets for any signs of wear and replace them if needed. This will help maintain the performance and keep the aggressive exhaust note sounding great.
