R red306 Member : 2006 Mazda 3 S Touring Apr 22, 2008 #61 I heard that 2.5 is better. everyone says something differnt. The only plus to the mazdaspeed system is that it wont void the warrenty.
I heard that 2.5 is better. everyone says something differnt. The only plus to the mazdaspeed system is that it wont void the warrenty.
