Rear Spring bushings when installing shackles

Hi everyone, I’m getting ready to take the plunge and buy my suspension and have seen several posts on shackles and bushings so in curious about the factory bushings on my 15 Tundra.
Is it necessary to remove the factory and replace with aftermarket or keep the factory? I’m looking at the Boss offroad shackles set at 1”.
Thanks Stay Safe and healthy everyone!

 

Replace them. The factory bushings are splined. The aftermarket are poly and will articulate smoother and will be a better ride.

 

Very important to swap out the factory pressed in bushings and swap in Energy Suspension poly bushings. Call @Toytec Lifts . They will help you get things squared away for your particular needs..