Coming back from Afghanistan in December and im looking to put some money into my coupe. Currently looking for a header, pulley setup for a reasonable priceanda muffler that wont cost me over agrandfor a reasonable price. Im pretty new at lookin for performance parts and it seems as if the 01- slk headers might do the trick? but not sure.How much power couldI see out of a pulley system. probably questions you get alot but thanks for ur time!