You can notice how I was able to use the stock headers and exhaust piping up to my Y pipe. But you are right shawnkey....knowledge is definetly going to be a factor in making a kit succesful. Chosing th correct diameter of piping, correct size and type of intercooler and most importantly turbo...I would love to see what a crossfire can do with a GT35r equipped with a solid tune. Speaking of which has anyone figured out what EMS or piggyback unit will work with a crossfire?!?!?!