2000 TRD 4x4 stock bilstiens

I know this question has probably been beaten to death but here goes, I've got a 2000 tacoma TRD 4x with what appears to be stock Toyota bilstiens , this is my first IFS 4 wheeler (first one was straight axle '83 toy) My question is how much difference is there between the "stock " bilstiens & the much sought-after 5100's ? I know the 5100's are adjustable for ride height lift & I'm assuming the stock toyota bilstiens I have now are not ride height adjustable, is this the case ? Thanks in advance

 

no the yellow bili shocks are not adjustable. chances are they are done. prob have been for a while. the 5100's are gonna be a big improvement. you can pick up a set of four fre around $400 bucks.