Subarubro

The whole issue I was having is it was leaking a lot and I need something that gets tighter to make it a good seal. Before I had this issue I kept tightening it more and more to stop leak than it snapped just like in the photo. I got these bolts below trying to match with the guy in the photo above. I thought tapered meant they got tighter as they screwed in deeper. I hope they work. Any other advice if they don't?

I have an 2013 outback and this happened to me aswell. What bolt would I need for this fix? The same one? I found a few online on amazon but can you post a link? The engine is a 2.5 4cylender.