New Energy Suspension Polyurthane torque arm mount bushing.  This 1 pc bushing inserts between your existing torque arm bracket for better torque arm control.  The weak factory 2 pc bushing cracks easily and quickly, causing a "thump" every time you accelerate and slow down.  A faulty torque arm bushing can also damage your driveshaft u-joints.  These bushings give you better ride and control.   Requires you to grind your existing rivets off your stock bushing, this bushing then just slides in place, some bushing trimming may be required.  This fits the following:

84-86 Camaro w/ 700R4 and T5 transmission
84-86 Firebird/Trans Am w/ 700R4 and T5 transmission

NOTE : These bushings DO NOT fit 82-83 nor 87-02 torque arm brackets.