Bilstein's 8100 series are a direct fit, 2 tube external bypass. This lets you adjust your compression and rebound zone independently while providing a plush "ride zone". The engineering concept behind these is to give you the best ride comfort and handling on road, while also taming large suspension inputs off-road. During normal daily driving you have the control of the full size 60mm main piston, you can take your rig to work, pick up a load of groceries, or hit twisty mountain roads with maximum comfort and control. Off-road, the large external bypass tubes let some oil "bypass" the main piston valving to get your suspension moving over the rough stuff. The final compression zone is tuned as a bump zone and the bottom rebound zone serves to slow down harsh top out events. If you tuned normal smooth body shocks to work as good off-road, they would be miserable on-road, and vice versa.
Everything about this bypass is built for the rear end of your 4runner. The reservoir position is 100% custom fit as well as the valving and even the bypass zone placement itself is specific to this application. This is not just a bypass that also fits the 4runner, its built from the ground up for the 4runner.
This is for a pair of external bypass shocks for the rear of your 4Runner.
These shocks are designed to work with rear lift heights from 0-1.5".
