Precision machined brass stock restrictor replacement. Includes a 2” silicone hose. If you lost or have damaged your restrictor this is the perfect replacement. This restrictor hose is located between the neck of the turbo and the plastic tee. Symptoms of a missing restrictor or bad hose can be peak rpm of 5000-5700rpm at 7psi of boost. This can also be a bad solenoid. A proper restrictor adjusts the boost range for proper operation. Stock machines should run 5900-6200rpm weather and machine health permitting. This part is not available from honda. No clamps or zip ties should be used with our replacement. Free shipping to continental USA.