I have an EF manifold for sale with 4 inch downpipe. The manifold is constructed of stainless schedule 40 pipe. It has a flange for a tial 44mm and is set up to run a large T4 turbo. It is in great shape. This manifold made well over 650hp on a ls/vtec with a gt4067. Reason for selling is I am putting my motor setup in a 98 civic coupe.