Velocity Stack For OKO 21mm 2 Stroke Carb

In amateur and professional racing, aftermarket velocity stacks are often used to increase performance. Velocity stacks allow smooth and even entry of air at high velocities into the intake, increasing power in the order of 2% to 4%. Choose from 5 colors: Silver, Blue, Grey, Red, and Yellow. Recommended for racing use only. Compatible with carburetors with 50mm diameter air intakes.