Hello so I did a msp swap on my 03 mp5 with a few mods and I was reading about a one way check valve on a vacuum line going to the fuel tank to prevent boosting the fuel tank and I couldn't find anymore details on that.
Has anyone done this and how? What's the best location for it and is it really necessary? Thanks!
Has anyone done this and how? What's the best location for it and is it really necessary? Thanks!
