LT, I RUN THE STOCK A-ARMS ON THE WOODS BIKE WITH WORKS DUAL RATE SHOCKS AND REZZYS. ON THE SAND MACHINE I HAVE LONESTAR PLUS 2 ARMS FOR A WIDER TRACK AND LONGER TRAVEL. THE ZILLA IS WIDE ENOUGH STOCK FOR THE WOODS, SO THE WIDTH ISN'T WORTH IT PLUS THE 600-800 FOR THE AFTERMARKET ARMS. IF YOU DUNE THEN GO FOR THE AFTERMARKET ONES. MY FRIEND PREDATOR ZILLA HAS PLUS 2 ARMS WITH PEP ZERO PRELOAD SHOCKS AND HE HAS 14 INCHES OF TRAVEL ALL AROUND. BUT THAT COST HIM 4 GRAND (AND HE NEVER RIDES IT). ANY WAY THE CHOICE IS YOURS, HOPE THIS HELPS.