Which cat back exhaust should I get for my 2003 EVO ?

Turbo xs rfl= $640.40 � � � � � � Borla cat= � �$670. � � � � � � � � Ets cat=. � � �$634.51. � � � � � � Hks hi power cat $622.35. � � � � Magnaflow cat $651.67. Skunk 2 cat=$600 � � � Www.lancershop.com