As soon as I saw that filter I had to quit watching because I can't watch someone destroy a perfectly good engine with a $5 filter. You need to take that thing off, throw it on the ground, stomp it, run over it, burn it, and and then ship it to asia so it doesn't end up over here again. Hell, I think a wadded up paper towel shoved in the carb neck might do a better job. You should also NEVER run your truck with low batteries in the transmitter, especially if you put wheels and tires on it. That's the absolute dumbest way to detroy a truck, by not having good batteries in the transmitter. Team Fast Eddy sells AA nimh batteries in bulk CHEAP, you could get a nice case of those and always have some charged up.
On the filter, when I got my RC that was the first mod I wanted because I have been building hot rods and race cars for years, and I wanted a K&N filter and braided hose and fuel lines to give it that nostalgic hot rod look. But when I did some research and saw some cylinders of engines that had been running with the K&N filters, I promised myself to do all I could to keep other people from going through the same thing. I'm sorry if what I said sounded harsh, but I would hate to see you ruin a perfectly good Savage.