I think you need a Manual transmission ecu correct? I would stick with the oem trans, it will handle 400hp and 480hp with internal modifications. if your looking for a better deal on the crossfire transmission, they are also used in the late model jeeps, I think its the Cherokee or something like that, check ebay for the trans. There is also a diesle version of our 6 spd that has a 5:1 1st gear, which would be strange to use in the Crossfire unless you lower the final drive gear somehow.