What is the time and cost to replace my rocker arms and lifters on my engine?

What is your question?

I have a 2013 Hyudai Elantra coupe and i need my rocker arms and lifters replaced, im just wondering how much would it be on part and labor, time and cost.

What makes this problem better or worse?

cold start

How long has your 2013 Hyundai Elantra Coupe had this problem?

a little bit over 3500 miles ago.