Well, I would assume that it at least weighs less than stock exhaust by whatever the resonator weighs - since the PE deletes the resonator.
I lucked out & got my PE new from forum member for $675 shipped - this is for the NA single sided version though...
Since I got the exhaust for good price - I had the dealer install for $110.
I could have done it myself, but it's MUCH easier to do with car on a lift, which I did not have access to. Figured it was worth the $110 to have them do it & be responsible for the install and save me from trying to do it on ramps in my drive