fail safe-
http://www2.towerhobbies.com/cgi-bin...&I=LXHLV3&P=ML
aluminum upgrades you can get fron a redcat dealer or redcat racing website
http://www.redcatracing.com/ just call the # on the site and Robert will help you. To up grade use HPI savage for some parts like 17T clutch bell and traxxas 4146X clutch spring. Use tutorials on rc universe redcat support forum. Redcat also has hump pack and purple shocks ,use 20% nitro at LHS(local hobby shop)