Hybrid Racing Intake System Upgrade Stage 2 (06-11 Civic Si)If you want to take your intake system to the next level, this bundle is Stage 1, but with the addition of a ZDX J37 throttle body and necessary parts to run it on your 8th gen Si. Not an ordinary cold air intakeWhat makes our intake system stand out is the countless hours of designing, testing, and refining that went into making it. Getting the material right was an important starting place. The main body of the intake tube is made from thick