PST's brand new H.D. POLYGRAPHITE Rear Leaf Spring Bushing Shackle Kit fills the gap in the chain-of-power/torque transfer to the wheels. Our POLYGRAPHITE allows for a smoother uninterrupted transfer of power. You will see a reduction in wheel hop and near zero deflection in PST's bushings. To cap it off, our robust H.D. shackles are zinc-plated to withstand years of road use.
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Available to the 48 Continental U.S.
Available on all parts, for as long as you own your muscle car.
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Making yesterday's muscle cars handle using today's tech.