King shocks/ long travel kit bouncy

Looking for feed back -

I purchased a 2015 tundra with a long travel kit: front and rear king shocks (non adjustable)+ Camburg lower & upper CA’s.

At 65-75 mph the rear feels stiff and bouncy, once I hit 80+ it goes away.

is this a sign of bad rear shocks needing to be replaced or should I try to change them out for a different brand. Or maybe I just need to change out some bushings?

 

IMO that's how it is set up by the prevoius owner. Try hitting some rough roads or terrain at fast speeds. It should soak the bumps pretty good. Maybe a good idea to replace the reservoirs with the ones with adjustable compression.

 

I'll mention these guys. @AccuTune Offroad