All 4AGE engines have the same exhaust port position and just the 20v engine incorporates a variation Along with the mounting experience. That variation getting that around the 20v The 2 outer holes are area more outwards that its 16V equal. While using the 20v engines easily gaining recognition from https://johnathanhnrll.oblogation.com/30772020/the-basic-principles-of-blacktop-20v-4age