No weird sounds at low rps just a lot of rumble sounds like a Mustang in my opinion.
have no idea about shipping I no longer have the box as I intended on keeping. As you can see from the photo it is long and weighs quite a bit. Local pick up in North Los Angeles County / Ventura County would be best.
can try to track down a box if someone's willing to pay for the shipping expense.
I did take the stock resonator off. Just unbolt the stock past the resonator and bolt this one in. Easy as pie