цитирую буржуя, говорит что номер 2 и 5 может реально поднять стабильность
Played around a lot on the 996 with the bushes, renewing all, and at one point I had some solid bushes in the rear - the track control arm and was glad to get them off to be honest. Solid bushes and poly are harder and so in consequence you get more rolling noise in the cabin and bumps in the road become harsher. Extra NVH - noise, vibration and harshness will quickly make you want to sell up in my experience but then I am an old git and don't do much tracking. Another view is that the oem rubber bushes on the 911 are very skinny and by that I mean the rubber section s very slim so really the advantage in moving to poly for this car is much lower than others, ie there is already minimal flex/slop/movement at the bushes. Having cut open some of the oem rubber bushes i would say as well that they are very well designed, eg the rear upper control arm bushes where these have spherical ball shapes inside the rubber molding. Having said all this I would probably go poly for the control arms, front and rear where the diagonal arm joins as I hear they help stability I hear.
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