Another source, [link=http://www.siliconehose.com/commerce/ccc1057-silicone-turbo-hose-turbo-hose-silicone-turbo-hose-high-temperature-turbo-hose-turbo-hose-silicone-turbo-hose-high-temp.htm]turbo hose[/link].

Click on the "turbo hose" link at the bottom left side.

This is good stuff which stands up to 4-stroke heat quite well, and is very flexible and durable.