Those are CNC reservoirs and the caps are standard CCW to loosen.
You can place a hose clamp on the cap then tighten it down, then loosen it with Channel locks. The clamp will protect the cap from jaw marks.
On the side pipe, take a look at the aft muffler to frame rubber mount, they tear easily and also all the collector and header mounting hardware for security.
If its the mount rubber you can use these (Avail thru Rockauto, Summit, Autozone, etc for about $2.50)
I use a hose clamp around the rubber mount to reinforce it. Not snug but just enough to keep it in place and not interfere with the rubber mount's vibration absorbing.
