XRT TUNNEL COOLER HOSES

Silicone Hoses designed for a clean seamless purpose built appearance, and to simplify your plumbing with a heat exchanger.

Silicone hoses are much more flexible than rubber hoses and can easily fit onto a much larger hose fitting!!   A 5/8″ (16mm) hose can easily fit onto a 18mm hose fitting.

Hoses can touch engine & cylinder head! But cannot touch any exhaust components!

Available hoses:

-5/8″ ID 90° elbow

-5/8″ ID 45° elbow

-Return hose

Return hose is made to be more universal fit than bike specific so it may not be a direct fit on your bike depending on the location of your coolant return pump and header pipe layout. You may need to modify the hose for your specific setup. Has 5/8″ ID end for coolant return from heat exchanger, 1/4″ ID for bypass return from coolant bottle, 3/4″ ID for connection to water pump. (see plumbing setup pictures

Heat exchanger /  tunnel hose (sold as individual hose)

36″ long x 5/8″ ID with 90° elbow for connecting to heat exchanger and long enough to reach the backside of engine where the connections to engine in/out are hidden from view for a clean seamless appearance. 

You will need 2 hoses, one for hot supply, one for cold return

A 3rd hose can be used from the the thermostat output → rear of engine to connect with heat exchanger hose. Silicone is very elastic, the 5/8″ hose can be stretched to fit over the 3/4″ thermostat fitting but it will take some muscle.

Thermobob output reducer hose elbow

90° elbow with 3/4″ on one end to thermobob – 5/8″  on other end to hose running back to heat exchanger. All dirtbike sized Thermobobs will have a 3/4″ output and are setup to have the output upwards toward radiators. You need to redirect that output backwards towards heat exchanger and reduced it to 5/8″ and this hose will simplify that for you.

Bypass Return Reducer

Used only on bikes that have dual cold return inlets!

Thermostat bypass goes either directly into coolant bottle, or goes through heated bars then into coolant bottle.

Bypass on thermostat is usually 1/4″ hose, and the the Coolant bottle output is also 1/4″. Maintaining this small 1/4″ hose makes it much easier to run your plumbing in those tight areas. Hose flares out on the very end to 5/8″ for and easy connection to your water pump inlet!