Strange struts (bottom) replaced the worn out KYB units (top). The Strange struts are adjustable and reasonably priced, and are quite effective. We know many true 10.5-inch racers who have run these struts on their 7-second Mustangs in NMRA competition. You can adjust the rebound from stiff to loose, depending on the application and what is required. A simple knob at the bottom of the strut takes care of the adjustments.