Mine Stillen Headers just cost a little skin from the forearms, a set of air/fuel sensors and a little attitude to install. Not so bad though. I as well have Stillen HFC, Stillen Gen 3 Intake, Stillen Grounding Wires, Stillen CBE, Stillen ud Pulley / Gates Belt, Stillen Sway Bars, Eibach Springs and have all the taillights smoked out. I love this car.