I just installed the MAC cold air intake last night. while installing , i noticed that there was a small HOLE . Not as in damaged or anything . It came like that. The hole is on the Pipe conecting the mass air to the throttle body. Its at the bottom of the pipe(when turning the pipe over, you can see it)!!!! does anyone know what that hole is for?? should i keep it open or close it or what??
alex
2004 mustang GT
alex
2004 mustang GT