yep,they are very big and heavy.on mine i have samba pipe, dt-1 airfilter,front and rear chassis braces,bulkhead brace,team chase steering link,alloy servo saver arm,red springs front and rear and fitted a mighty tonegawa steering servo with a modified arm,some titanium wishbone pins, and some titanium and alloy bolts,lipo battery.not had it too long and only run it once,few minor problems but it didnt break.i have run mcd and hormans before and constantly bent or broke them.bigger defo is better!