Im Interested In Gaining The Most Performance And High Quality Sound For My 2001 Cl-s..... I Was Looking Into The Comptech Headers Which Would Give Me About 32 Hp To The Wheels..... This Will Cost About 1200$$....... Then I Looked Around And Found Aem Header Which Would Give About 10 To 15 For About 415$$....if I Was To Get The Aem Headers I Would Have Enough Left Over To Buy A Greaddy Evo Ii Cat Back Exhaust..... What Is My Best Bet To Do .... Just Comptech Headers.... Or Aem Headers And Greaddy