I am afraid my engine has a leaking head gasket. I ran a compression test and here are my results 178-123-120-180. This was on a jdm motor i just installed a couple of months ago. My question is: Where is the cheapest place to get a head gasket that is not cheaply made? and Are the bolts on the head torque to yeild bolts. <-- Meaning, do i have to replace the head bolts as well?

$46 for a head gasket from Courtesy. The bolts can be used if they are not past the tollerable limit in the FSM. Its a good idea to replace them. They are cheap insurance.