1st off let me start off saying wassup and giving props to my marquis riders. STILL MERCIN''





i just purchased a 03 marquis and i want to startbeefing upthe performance. where should i start? im thinking about doing the exhaust 1st. some friends said i should order the interceptor exhaust pkg but i cant seem to find where to order it. so if you could help me out with anything that would be awsome. Thanks.