you can use them without aftermarket pushrods but for best performance you might want to get them, but for sure you would have to use aftermarket valve springs, for 1.9's intense recommands ls6 medium load springs
You also have to pay for the new pushrods!Merc said:Look at it this way too. You are already there. Once you remove the rocker arm, its just a matter of grabbing the stck push rod and pulling. Then replace with the new one. I bet you will kick yoruself later if you dont do it.