Originally Posted by Pitkis
Dunno, this is pretty difficult. Metal is out, it's too hard without welding more reinforcement. Delrin is almost like metal; no go. Poly is hard and might work, but no one supply them. And Group N is rubber - racing rubber? How that is compared to OEM bushing? Any idea? Worth spending USD 800 to couple of bushes and find out that it's still rubber and far from hard plastics..?
Ask TurnerMS about the group n bushings. Solid alu or delrin are probably best for a strictly track car. If it's mostly a street car/occasional track, I'd go with the group n. For a DD, the oe M3 bushings are probably best. That's the feedback I've gotten from a couple engineers/tuners.
2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, KW/M3 susp, Apex Arc 8, Mich PSS