b'GM F/X AXT-PRORSRT/JRI Single Adjustable Rear Shocks:oRon Sutton Famous Secret Sauce High Grip RearValving Utilizes Tie-Down Technology to Create MoreRear Grip on Entry under Braking & Acceleration on Exit oYou Can Quik-Tune the Tie-Down Time with the Blue ClickStyle Adjuster Knob on the Shock Head / No Tools Needed o80 Clicks Tunes the Tie-Down Force from 0# to 400# o0-160# for Autocross / 80-240# for Road Courses oA Great Dual Purpose Autocross & Road Course Shock Draco Professional Racing Front Springs:oWe Prefer Dracos use of 9000 Series Steel Spring Wire oNever Sags or Settles. Never Loses Rate. PeriodoSpring Rate Dyno Graph Sheet with EVERY Spring oVery Accurate & Linear Rates Over Long Travel oThe Common Car Guy Thinks a Spring is a SpringoBut Pro Racers Know Draco Springs Make a Better Handling, More Responsive & Higher Grip Race Car. Why Settle for Less? Torrington Style Needle BearingsPair for Front: oCaged Needle Bearing AssembliesoRide Between Two Stainless Steel Races oGo Under Springs to Completely Eliminate Spring Bind oAllows the Springs to Operate at Their True Rate Throughout TravelTech Tip 8: Shocks are the final frontier to making cars have more grip to brake, corner & accelerate better & faster. One of the most important measurements of a shockand the leasttalked about by average car guysis its response time from input to control.From small inputs, like minor track surface irregularities to larger inputs, like bumps, how quick a shock responds IS the most important key. It does not matter what your shock valving isor that it is adjustableif the tire isnt loaded on the track surface! For this reason, any design technology that makes a shock respond quicker, is valuableand slow responding shock designs are not acceptable for winning track performance. The first important choice youll make is between Hydraulic Twin Tube or Gas Charged Monotube. Its not really a debate. Twin tube shocks respond in the 20-30 millisecond range & monotube shocks respond in the 4-8 millisecond range. That is a HUGE difference! Running twin tube shocks in a race car makes no sense, unless the rules require it. The ARS, Fox, JRI & Penske race shocks we utilize are of the superior monotube design. Testing has shown our ARS valved shocks to be the absolute best for autocross, while our Penske valved shocks dominate on road courses. JRI shocks are the best dual purpose autocross & track shock, but expensive. Our Fox Racing Shocks are very close in grip for 1/3 less money.Superior, faster responding, higher grip monotube coil-over shocks typically cost $200-300 more than the lower performing twin tube design shocks. Scrimp somewhere else. Buy the monotubes!Remember: It does not matter what your shock valving isor that the valving is adjustableif the tire isnt loaded on the track surface! 540'