As TC has just indicated, "custom valving" is the more correct term. Regardless if the shock is non-adjustable, or single or double adjustable, for the most serious effort in racing/competition, having them matched to your suspension and car is another advantage to add to your vehicle. So, when you're racing in the .001 of a second, on an autocross or road course competative event, everything matters. If your competitor who just beat you had his shocks re-valved to better suite his car, and you did not, you might consider doing so.


Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!