RPM 73292 Front Spindle Blocks, ECX Boost/Circuit 2WD/Torment 2WD, Black Designed to increase durability Replaces weaker stock components, check for full parts compatibility Made by RPM R/C products, a United States based company where resources are sourced from American producers Replaces spindle blocks from stock ecx #1089 and from ecx #234000 Fits 2WD versions only, 5x11x4mm bearings not included