Is the OEM headgasket good, or should i go for an aftermarket headgasket like the one cosworth has?

And also i am going to be doing a water pump and i see that auto zone has a much cheaper water pump for our cars than what i see on lancer shop, just seemed strange to me.

 

the OEM headgasket is fine.

I'd stick with an OEM waterpump though.

 

Would you say that an OEM timing belt is also good? Or should i go with a stronger one?

 

OEM timing belt is fine, just change it every 60K miles. The stronger timing belts have been suspected of causing oil pump failure due to overtightening and no 'give' in them.

 

Oh okay thanks for the information, appreciate it.