Call THRASHER
They have a nitrous plate to go behind the throttle body, every pulley size you could ever want, torque steer bars, intercoolers, camshafts, torque converters, if it makes power, then they are selling it. I think they are doing headers as well. Give the guys as THRASHER a call and they can take care of you, make you go fast with class in a 4-door.