I cant see how on 16v electronics, I hooked everything up and at idle/very low RPM there was fuck all vacuum. It was quick all I needed to do is put my engine information in and so they sent me a e mail rapid. Excellent costumer company This is now https://4age-20v-itb04792.anchor-blog.com/9368715/not-known-facts-about-4age-20v-itb