With RcMart you need choose EMS delivery. I always get my stuff in three days. It's expensive but I usually wait until I place a big order so it's worth it to me. Once I ordered from Rcmart and tower at the same time and got my Rcmart order first.
HKS just ignores you and your lucky if you get your stuff. If you call them and they pick up and you try to talk to them about your order they hang up and never answer again. Caller ID.
I missed a very important race due to their lack of respect. Never again.