Hi fellas, sorry to butt in, but can I ask a question as someone who has just acquired his first XR6? It's a 2011 non turbo model with 27,000ks on the clock. my question is: am I supposed to be able to hear a fast, muffled regular sound, especially when the revs are coming off? It's almost like there's something in a tyre and I can hear it hitting the road every cycle. Or like the wheel alignment is bad. Neither of these is the case though. Is it the proper throbbing of the engine? Is it supposed to make that kind of sound, or could I have a problem with the car? Thanks guys.