The OE link is a compromised design, a largely unsuccessful attempt to blend low cost, the ability to transfer force and low NVH (noise, vibration and harshness) into one component. In particular the OE link does not transmit force in a linear fashion as cornering speeds rise. Instead it deforms, bending and stretching which makes the output suspension movement far less predictable. The new steel links transmit force with much more precision, greatly improving the 'predictability' of the car's handling under fierce cornering conditions. One might expect this part to increase perceived NVH in the cabin, but this is not really the case. As noted below, STi models have a similar part fitted as standard, and no one has complained about the increased cabin noise in an STi!