Yes, they will clank if they are installed improperly. But if done correctly, they will not clank so you will not hear metal on metal. As DiMarco mentioned, they will last forever as the rubber ones tend not to.
4.5” Hardin Marine polished stainless exhaust flaps
Part number 410-280176
Used for 30 minutes in fresh water (Parker, AZ) Perfect condition
$200 obo
Buyer pays shipping
So your thinking maybe run one of each then? Good marine cranking battery for the engine to run off of and a deep cycle for the rest? Was thinking about just going the interstate route.
Engine is a EFI (Autronic system). Boat has a small stereo and is set up with two batteries. Should one battery be a "Starting" battery and other be a "Deep Cycle" or what is your guys opinion? Whenever I run the boat I would have to run it on the Starting Battery and switch over to the Deep...