Where is the best place to buy the good (I think it only comes in blue) high temp, silicone exhaust hose ? Thanks.

Trident hoses are what you are looking for. There is blue and red hose. Red can withstand higher heat. Do a search for "Trident". Btw, hose is not cheap.

Thank you sir. I ordered some of the Trident 202V..supposed to be good for 350*. It also says its supposed to last 6 times longer than the black rubber hose. I got 3' of it (enough to do both my motors) for $141. Considering the cost of the boat..the hose is cheap insurance and makes me feel better, so it was worth it to me. Thanks again.