b'GM F/X RACE-PRO AITrack-Pro Double Adjustable Panhard Bar Kit:oWide Range of Adjustability Allows You to Run Old SchoolSoft Spring or New Tech Stiff Spring Setup Strategies oSuper Low for Stiff Spring / Higher for Rear Soft Spring Setups oPassenger Side Housing MountSlotted for 6 of Adjustability o12-Point 170K PSI Bolts, Spacers & HardwareoDriver Side Frame Mount Slotted for 4 of Adjustability oComes Long 1.5 x 2.5 x 22 - Cut to Length oGrade 8+ Bolt, Spacers & Special Slot Nut Hardware oLaser Cut 1.5 x 2.5 Brace can be Mounted at 30 or 60oMatrix Lined Chromoly Wide Body Rod Ends & Jam Nuts o1.25" x .095" 4130 TIG Welded or Unwelded Tube Watts LinkOptional Quik-Tune AvailableTech 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, which is a superior steel to the 2000 series. Much more expensive, but it sags less, loses rate less & responds faster than 2000. Today, many spring manufactures use 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 madefrom 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.1136'