All 4AGE engines have the exact same exhaust port placement and only the 20v engine has a difference Together with the mounting facial area. That big difference currently being that on the 20v The 2 outer holes are area even more outwards that its 16V equal. Using the 20v engines https://4age20vitb60471.xzblogs.com/72468841/5-simple-techniques-for-4age-20v-turbo-engine-for-sale