Exhaust got hot when my impileer went bad and melted the rubber couplers. Where do I get new ones? Can I get it from hardware store or is it from a marina

We had a thread going on this topic a few months ago. Order some high-temp silicone ones from one of the go-fast auto stores. Get rid of the hose clamps and get some good stainless bolted bar clamps.

I have some rubber couplers. How many you need? It's 4" stuff.

I personally like the high temp silicone also. They cost a bit more....but in my opinion its worth it.