This week we answer the question as to whether or not the velocity stack is all that stands in the way of being the first ATV across the mud hole:

https://atvconnection.com/articles/a...locity-stacks/

 

The only thing I ever had a velocity stack on was an EVO 2X powerboard (scooter). With that I was able to use an ADA Racing air filter with better airflow. And I added a power pipe exhaust and was able to boost a 50cc engine with 4.something HP up to 6 HP. In my case it was a big gain in a small engine, but I don't think you can get a big gain like that on a bigger engine.