One framework containing composite components (except pistons) for two T4 & X4 ULP aluminum shock absorbers. These surprise parts feature the top of shock limit with a hole makes it possible for for faster, easier and much more comfortable shocks rebound adjustment. Updated for the X4, with 2 vent holes into the top limit, instead of 1. This makes for a more predictable and forgiving maneuvering and improves traction.
