1.We installed Hotchkis' complete rear trailing arm and bushing package (PN 1803) in our Cheap Street Chevelle. The package includes two lower trailing arms, two upper trailing arms and two trailing arm mount braces, along with all the necessary bolts and bushings. The bushings aren't just O.E.M. replacements; rather, they're made of polyurethane and are much beefier than the stock units. Notice how heavy-duty the trailing arms look; they won't flex and bend like the O.E.M. trailing arms will.