the ctr and itr share the same motor, they're both k20a.. only main difference is a more restrictive header and a lighter flywheel on the ctr and i think slightly different ecu... nothing that you dont already have to replace anyways.. you need a aftermarket header one way or another and you're going to want hondata k-pro or atleast a flash. joe's engine came from a jdm ctr but its just the same as comming out of a itr.. same engine.