RPM #70672 ECX Torment 2wd Ruckus 2wd Circuit 2wd & Boost Sealed Gear Cover The upgrade part fits generally to most RC cars and trucks. It is made of alluminum which is ligher and stronger which enhances the performance of your RC cars greatly 105313 It takes 5 to 10 business days to arrive by standard airmail shipping. Most packages are packed and shiped within 12 hours. Expediated shipping is shipped by DHL or EMS. Packages will arrive in about 2-4 days.