So I just installed turbo xs rfl on my 2013 2.0 t installation was easy but I'm not getting the sound I've heard in previous videos and to me seems like the piston isn't opening all of the way and the release seems to be real quick before piston closes again I have it tapped into the vaccume source off of the intake manifold I have searched and called raj I read that the spring was suppose to be 3.4 the one I was sent was about 4.25 so I cut the spring to size and it had gotten slightly better. When I talked to raj today he said with the 2013 the spring is suppose to be 4.25 roughly and that I would not have to run any washers any help with what other members who r running this set up.