Originally Posted by marconi118
so finally is the tension road with the stiffer bushing?
Yes, the M3 tension rod has a much stiffer rubber bushing on the inner side. But the M3 wishbone (lateral link) has a sealed bearing instead of a rubber bushing, so it's considerably stiffer the the 1 & 3 series OE parts. So both will help the precision of the front end.
2009 135i, Alpine White, 6MT, M-Sport, iDrive, iPod/USB, Heated Seats, Premium Sound, BMW Assist