For those that are looking for JUST the bushings here is what I got - https://www.amazon.com/gp/product/B00ZVJ0M12/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1 .

You may have to trim down the length depending on where you put them but they work REALLY well and fit perfect (mallet fit as others have statesd).  If you need the center bushing shaft here is what I ordered. https://www.amazon.com/gp/product/B00K7D4F2O/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1 .  Once again slight trimming needed but it was quite literally a 10 sec cut to a couple of them.  I also upgraded all my hardware to TRUE 10.9 harness bolts.  Now that was ~$120 just in bolts.  But it was well worth it to me as my old ones were bent and I could tell by the softness of them that they were not near as hard as the rating suggested.  I got my bolts from a local Fastenal but you can get them about anywhere and im sure you can find them cheaper than I got them for.

Chuddly, thanks for the heads up on these. I was just going to order a complete set of OEM rear bushings because I don't want to go through getting the grease cleaned out and cementing the new ones in, but the ones you ordered on Amazon are $50 vs $180 and you said they had to be installed with a mallet, are these not the same ones that NMK had to glue in place? From what I found checking part numbers it looks as if the Z8 and Z6 use the same bushings so they should fit my Z6, if you or someone else can confirm that these bushings will fit my Z6 and that they need to be hammered in and not glued I will order these puppies in a heartbeat.

I just looked on Alphas website and they are the same part numbers between the z8 and z6 so you should be good.  And yes on mine i had to use a mallet to get them in (not like they didnt fit but like they were nice and snug.  I cant say exactly how yours will fit but I would assume the same.  Well worth the money savings in my mind.

I checked Alpha as well, so I figured I was good to go. I guess NMK used a different bushing.

[2015 Z Force 800 53/Trail EPS]

I checked Alpha as well, so I figured I was good to go. I guess NMK used a different bushing.

Yeah but now that these are available I'll be getting these.