dont know how true this is but i was told it is not an exhaust leak, the car is running lean and pinings @a low rpm(1200-2500rpm) car needs to be tuned:(
is anyone using and h pipe set up on a 05 or newer mustang gt? i have a x pipe set up and it sound like my mufflers a broken. does it matter where u get the x pipe from or do they all sound like that?