hey my stock endlink is still alive and spiffy.. at least, thats what I think.
but I'm not hearing any weird noise in the back and the handling is the same so its there.. (I hope)
I remember the first guy that did the swap, compared it with his dad's RSX and stated that the stock ex endlink will work fine...
I took his word for it...
it'll add hassle to the install if u want to swap that out too though... but if u want the part number, u can check
www.acuraautomotiveparts.net