RE: Hop-ups for HPI Rush Evo
Go for the titanium chassis!! I got it for my rush & I installed it with the HPI graphite upper deck. This past week I was running it when I went head on into a curb at between 35 & 40 mph. It went about 5 feet straight up & flew about 10 feet before landing & tumbling to a stop. It shattered the graphite upper deck & all 4 chassis screws in the front bulkhead blew out of the truck completely. The titanium chassis laughed at the crash without a scratch. I have to give f4iracing a big thumbs up for their quality & durability. I just ordered the titanium upper deck from them & they are modding it to work with the lay down steering servo with no extra charge. Also the spur gears for a savage work perfectly on a rush. I put the Robinson 54/14 steel set on mine.