BBR Tuning Motorized Bicycle Boost Bottle Intake Manifold &ndash; Gas Bike High Performance Boost Intake Manifold (40mm) NO DRILLING NECESSARY: The BBR Tuning Tapped Boost intake manifold comes pre-tapped. No longer do you have to drill and tap your existing manifold to install a boost bottle on your 2-stroke motorized bike. This manifold comes ready for a boost bottle, just bolt on the manifold and install the fitting for the boost bottles tubing. INCREASES PERFORMANCE: This manifold is a high flow low restriction intake that allows the smoothest flow of gas and air to be sent to the engine. Smoother air flow allows the engine run more smoothly and increase acceleration and torque EASY INSTALLATION: Installation is simple: remove the stock manifold and intake manifold studs. Fit the new manifold up to the manifold ports, install the new intake studs in to the cylinder UNIVERSAL FIT: This 2-Stroke exhaust is designed to work with any 40mm stud spacing exhaust port common on motorized bicycles such as 48cc, 60cc, 66cc and 80cc. Be sure to measure the distance between your studs to ensure correct fitment. INCLUDED COMPONENTS: 1x BBR Tuning Boost Intake Manifold