Posted November 5, 2008 My supervisor explained he's serious about building several these up, needs to be less expensive than $450. He's also thinking about performing some custom tuned duration manifolds, some for pressured induction and a few for NA. Now you have been provided all of that is required, https://claytoniymcd.blogoxo.com/35788611/the-smart-trick-of-jdm-toyota-4a-ge-that-no-one-is-discussing