Is there a difference between a stock 2.2/2.3 and a 3.0 muffler?? and is our CL's muffler different from the accords??? Reason that i'm asking is because i'm trying to decide if i should replace my stock 2.2 muffler with a performance one.... I already have CAI, headers, Cat, and pullies so i was just wondering would those 4" mufflers even help my performance at all. If not i'll rather not have the ricey noise ya know....... thx