03 Leggy L engine noise

[Wolfgang]

Car has 75K on it - purchased from dealer at a good price. Very clean, in and out with minor paint fixes done before he sold it. Carfax is clean, shows more or less regular maintenance.

Only issue I have is this slight "breathy", almost diesel sound when I accelerate. Drive speed does not matter. When I step on the accelerator it becomes apparent. As soon as I let off or coast, sound just about disappears. Almost sounds like an exhaust leak, but not quite. Turning the radio on low almost masks it completely. Do not have it with my old 96 suby with 177k on it. Am I being overly cautious or what?

Any ideas guys?

Thanks in advance.

Wolfgang