Motorcycle Velocity Stacks

A velocity stack is a part of the air intake system designed to make the airflow coming to the carburetor or throttle body of the fuel injection system smoother and more consistent even at high speed. When modifying their bikes, riders tend to upgrade their air intake system first, because it is a fast and easy way to enhance the performance of their machines. An accessory like a velocity stack can significantly improve drivability and help produce more torque in a lower, mid-range, or higher RPM range. The result greatly depends on the length of the velocity stack tube.

The device features an air horn-shaped tube with a smoothly polished finish for better airflow which can be bolted in place of an existing air cleaner. Besides providing obvious performance benefits, an aftermarket velocity stack can add an interesting detail to your motorcycle’s exterior. Most of the time, these parts are CNC machined from billet aluminum and feature glossy paints and finishes, including mirror-polished chrome. Some models come with protective stainless steel mesh screens designed to shield the air intake system from debris and insects.

First and foremost, you need to decide on the portion of the whole rev range which you want to improve. For high-speed riding on a track day, a very short velocity stack is the most suitable option. It gives you peak performance on high RPMs. And vice-versa, a longer velocity stack provides better performance at low rev range. The installation of a velocity stack can be done in less than an hour with the use of only basic hand tools. Check the provided assembly manual for detailed instructions. After you’re done, don’t forget to recalibrate your ECM to avoid engine damage. Browse our online catalog of motorcycle velocity stacks by some of the most reputable manufacturers in the industry, such as ProX, Roland Sands Design, Xtreme Machine, and others.