The Honda FIT has a TORSION beam rear suspension, not a RIGID beam. This structure twists to allow semi-independent movement of the rear wheels. The PRSB is a torsion bar attached in parallel to the torsion beam to alter the spring rate. It definitely has a function.
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Originally Posted by JDMchris.com
I know im gonna get flamed for this, but the PRSB also doesnt have any function.
A rear swaybar only functions if the center portion is mounted on the frame of the car to reduce the roll. If it is simply bolted to the cups for the springs it will do nothing but add weight. A rear sway bar installed properly will cause too much oversteer on the Fit. This is why Ben only made a front sway bar. Why? Cause the rear isnt needed.

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