The Serpent doesnt come with aluminum knuckles nor do any of the kits i have seen locally. I havent seen all of the top kits but the ones i have seen dont use aluminum knuckles. Kyosho may but you are talking a car that cost alot more. Plus as stated, i wouldnt run aluminum knuckles on the car anyway. That is an area where a little flex and forgiveness goes a long way with the wallet and wrench time of changing out broken arms.