BBR Tuning High Performance 2-Stroke Motorized Bicycle Engine Billet Intake Manifold - Gas Bike Manifold Upgrade (30mm) BOOST PERFORMANCE: The BBR Tuning High Performance Billet Aluminum Intake Manifold is an easy and affordable upgrade for 2-stroke motorized bicycle engines. It's designed to help your engine run more smoothly help dissipate heat better than the stock cast manifold. INCREASES AIRFLOW: With a smoother barrel and an o-ring to help seal your carburetor when installed, this intake manifold will boost your engines throttle response and acceleration. It's also shorter in length so your fuel and air mixture has less distance to travel resulting in more power. EASY INSTALLATION: Installation is simple: remove the stock manifold. Fit the new manifold up to the manifold ports and install it on to the cylinder body. Fit your carburetor on, fasten around the manifold, and you're ready to ride UNIVERSAL FIT: Designed to work with most 2-stroke motorized bicycle engine kits 48cc, 60cc, 66cc and 80cc that use 30mm spaced intake studs. It's highly recommended that you measure the distance between the two intake studs on your engine to ensure proper fitment PACKAGE INCLUDES: 1x BBR Tuning Billet Aluminum High Performance Intake Manifold