Review on Dorman 615 177 Intake Manifold by John Roby

I was hoping that the modified valve cover would prevent excess oil from entering the vacuum system intake. That does not work. I had to install an air valve to reduce the vacuum in the PVC line. Thus, the amount of oil entering the inlet is minimized. I am giving the product two stars because I needed a replacement hose and fittings. Other than this set, they're hard to find.