Kartboy Rear Diff Crossmember Bushes SoftRear Diff Bushings (Soft) Ever shift super fast and hear a clunk from the rear of your whip? Yeah? Thats because the rear differential is moving around on squishy bushings. Stop the movement madness with our harder bushings. These sandwich the rear sub frame outriggers, and eliminate some of the squishiness. These arent the super hard race version, but theyre definitely stiffer than stock. Theyre still comfortable for every day, but you may experience