All 4AGE engines have the same exhaust port placement and just the 20v engine includes a change With all the mounting experience. That change getting that over the 20v The 2 outer holes are spot further more outwards that its 16V equivalent. Along with the 20v engines easily attaining reputation https://4age-20v44554.blogozz.com/30701493/the-smart-trick-of-toyota-4a-ge-that-nobody-is-discussing