I need to replace my Super Charger Belt. I am just going to order the 5 or 10% pulley and the different belt. Which pulley should I get, I have headers and full exhaust but I don't want to cause any more problem with this car, cause if I blow the head gaskets this year I am going to drive it off a cliff. If a 10% will be good since I have the whole exhaust opened up I will get that or should I just be safe and get the 5%. Should I order this from SCPI, will I get it in a decent amout of time. Or who else carries this? Thanks