I did not like them, polygraphite has to be precision bored to fit right like a bearing, they need to slip as they are NOT static like the rubber ones. Delrin is better but also need to be precisely bored to fit for same reason.. The rubber ones at Pelican are expensive but quality and rubber is static so they just sort of twist and not slip fit like a bearing.
Here is a rubber set that is not hundreds of dollars, but about $60 for the budget/ the poly graphite used to be $70 when they first came out, and people did have problems..
http://www.automotion.com/neatrix-front-a-...or-porsche.htmland another source oem ect..
http://www.sierramadrecollection.com/store...tail&p=3638I tried both poly graphite and delrin and did the home boring (should have went to a machine shop) with a brake hone and had rattling on a couple, and on the other set I did not bore enough and the supsension would not move or do not listen to the lie that they will break in after 30 days, I needed a kidney belt after one 3 hour drive trying to break them in..
Then there is the issue of sag and how long will plastic of any type really hold up or last? At first they sold as the ultimate and now well the price is dirt cheap and everything else speaks for itself.. Rubber stock lasted this long, so probabaly get a good run out of more rubber..
Oh and one hint fire is your friend, torch out the old ones if you can't get them loose... Lot's of dish soap and water to get the new ones on, I did not have a vice big enough so I used long plastic clamps that have a hand squeeze trigger like you would buy at home depot.. and make certain they are on all the way before the soap starts to dry and they get stuck solid.. quick! firm! slippery! you can put them on the car immeadiately if your carefull not to lose position that way you can check that they are indexed properly for fit and function, then I waited overnight before I drove, perfect ever since..
It was alot of work for me to do the whole car 3 times, but I must say I am happy with the rubber and it gives a softer stock ride..
The other is more like a dance when done correctly I am told.. But I will probably never know.