I'm looking to buy new headers for my '98 svt. I've narrowed it down to OBX and MSDS but I'm open for suggestions. I just want to know how both of these fit to the car and how they ran (from people who bought them). Also, are there any other addtional parts you need to buy in order to get these to fit (up until the cat)? I heard you may need a y pipe for the msds.