I wouldnt use the teflon liner ones on a full race
car... I buy the moly ones... they are pricey but if
you clean them and lube them a couple times a season
you can get years out of them... I clean and lube
mine about 2 or 3 times a season just to make sure
things are free and nothing is binding(that can really
upset the chassis)... I have bought them from a few
different places.. Summit, FK and 1 other place but
I cant find the name right now