These urethane reinforcements fill the
empty void space in E36/E46/Z4 rear trailing arm bushings (RTABS),
which both stiffens the suspension slightly and is a preventative
measure against failure of the weak factory bushings. 75D hardness
makes this a great street performance product. They're an absolute
necessity on the track though we ultimately suggest a polyurethane
bushing as the best solutions for cars seeing numerous track days
per year.
Applications include all E36 3
Series cars (excluding 318ti), E46 3 Series, and Z4
models.
Not for use with Powerflex rear
trailing arm bushings, which have this material built into the
bushing.
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