If you are talking about the long arms that bolt right behind the firewall & connect to the rear lower control arms, I don't see where they can use poly mounts. Problem with polyurethane is it is prone to binding, the last thing you want in a well designed suspension. You want the best bearing you can get there so get TRW made arms. I would be very wary of buying anything from Vertex. The floating captive nut that secures that bearing is easily damaged so be careful when loosening & torquing it!
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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