The Nameless Performance Bypass Valve has been designed to release the pressure from the charge circuit at the right time. Meaning some aftermarket bypass valves can react too slowly or even too quickly only allowing a fraction of the pressure to be released.
With the Nameless Performance Bypass Valve, it has been engineered to release the excess pressure in the charge circuit in a quick manner, without restrictions, or allowing pressure to be surged back into the system. Nameless has tested this bypass valve successfully without tuning, and the end result is a bypass valve that behaves just like a factory valve. You would only need a refined tune if you have a vehicle tuned around a leaky factory, or aftermarket bypass valve.