I really failed to Feel they did A lot on the bigport and smallport? i had a S/T 20v once that hated everyday living when it had been disconnected.. For the principle fuel feed line I filed 50 percent the prevent away so i could rotate the line a little https://beckettsxyxv.actoblog.com/31965682/5-simple-techniques-for-4age-20v-turbo-engine-for-sale