Coolant hose for oil cooler to pump pipe.
NOTE: This hose is no longer available in the proper dimensions; however, this one works perfectly fine and still seals well. The end of the hose that connects to the metal pipe running to the water pump is marginally oversized (1mm), but seals nicely on the barb and deforms under the clamp to make a good seal. Thousands of these hoses with the slightly-oversized end have been operating leak-free for years—in other words, they work.