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Yes, the red hose is for the valve.
You need to use the stock hose coupled with the Larini hose (using the metal coupler they supplied). The OEM Lotus hose will fit to the coupler with persuasion (warm the end of the tube and stick something in the end to slightly stretch it). The stock Lotus hose should be used in the most heat sensitive areas (near the muffler valve). The hose Larini sends are not as heat resistant as the stock Lotus ones, so the Larini hose should be further away from the valve. I also used two layers of heat wraps for extra protection.
Also, for some routing info see:
http://www.lotustalk.com/forums/f170/larini-valve-hose-routing-170201/
You need to use the stock hose coupled with the Larini hose (using the metal coupler they supplied). The OEM Lotus hose will fit to the coupler with persuasion (warm the end of the tube and stick something in the end to slightly stretch it). The stock Lotus hose should be used in the most heat sensitive areas (near the muffler valve). The hose Larini sends are not as heat resistant as the stock Lotus ones, so the Larini hose should be further away from the valve. I also used two layers of heat wraps for extra protection.
Also, for some routing info see:
http://www.lotustalk.com/forums/f170/larini-valve-hose-routing-170201/