The (often referred to in the context of Harley-Davidson V-Rod performance) is an intake modification where the lower half of the airbox housing is removed or modified to improve airflow. What It Does:
Many riders prefer to use aftermarket airbox kits (like Motohooligan) which are designed to optimize airflow while providing a better seal than a DIY modification. Bottomless mod
While it can increase peak power, removing the intake runners can affect laminar airflow, which might negatively impact low-end torque for street riding. The (often referred to in the context of
Because it significantly changes the air intake capacity, you likely need a remap or fuel tuner to ensure the engine doesn't run too lean. Helpful Considerations: Because it significantly changes the air intake capacity,
It is often paired with a "topless" mod (removing the top cover) to maximize intake volume, leading to potential HP gains.