b'MOPAR TRACK-RSXRSRT/Penske 8300 Double Adjustable Rear Shocks with Canister: oCutting Edge Technology with Decoupled, Digressive Pistons Provides High Grip on Rough Track Surfaces by Following Track Undulations Better Than ANY Piston TechnologyoHSRB Bleed Shaft Provides a Wide Tie-Down Range WhileKeeping High Speed Valving Consistent for Bump Control oThis Allows Us to Get Mean with the Tie-Down & NotSuffer Loss of Grip Over Bumps on Rough CoursesoSeparate Compression Valving Adjuster on Canister oThe Canister & Low Nitrogen Pressure Create Grip onUneven Track Surfaces Found on All Road Courses oRon Sutton Famous Secret Sauce High Grip RearValving Utilizes Tie-Down Technology to Create MoreRear Grip on Entry under Braking & Acceleration on Exit o0-80# (0.0 - 0.1 sec) Works Best for Rough Courseso80-160# (0.10.2 sec) Works Best for Average Courses o160-240# (0.20.3 Sec) Works Best for Smooth Courses o50 Clicks Tunes the Tie-Down Force from 0# to 400#Draco Professional Racing Rear 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?Tech Tip 17: All suspension springs are not created equal. The spring steel material & the processes utilized in manufacturing the spring, play a big role in the PERFORMANCE of the spring. For decades all production car & race springsleaf & coilwere made with 2000 series steelbasically crapthat responded slow, sagged & lost rate with time & use.Hyperco came out coil springs made with 4000 series steel for Indy Cars back in the 80s. The 4000 series steel is simply a superior steel to the 2000 series. Much more expensive, but it sags less, loses rate less & responds faster than 2000. Today, AFCO, Eibach & others spring manufactures make coil springs from 4000 series steel.Japanese firm Swift makes springs with 5000 series steel that are better than the all the 4000 series steel springs. Again, a little more money, but better. But the very best springs are made from 9000 series spring steel from Renton & Draco. Amazingly quick response. No sag. Zero. No rate loss. Ever. Renton makes NASCAR springs. No coil-overs. Draco has a full line.In on track tests with data loggers & shock travel sensorscomparing 4000 series springs to Draco 9000 series springswith the exact same rateshave proven to make the suspension respond quicker, create more grip & run faster lap times. Funny thing is, were only talking a little bit more money. Draco coil-over springs are about $40 more than Hyperco, Eibach, AFCO, etc. The more you knowthe faster you can go.1001'