|Ford Mustang 05-06 Tokico D-Spec Shocks. D-Spec (damping specific) is a new extra-wide range adjustable damping system from Tokico. The extra-wide range makes it possible to use D-Spec for street, auto cross, drag racing or even road racing. The D-Spec shocks & struts allow you to adjust rebound and compression simultaneously. Between hard and soft settings, the D-Spec shocks & struts are infinitely adjustable. The D-Spec shocks will give your Mustang the performance adjustability Mustang owners have long been waiting for you. These shocks will allow you to be road racing one minute, then going on a long road trip the next minute, fine tuning your suspension to that specific need.